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Cereal leaf beetle

January 01, 1970

The cereal leaf beetle (Oulema melanopus) is a significant crop pest, described by Carl Linnaeus in 1758.

Cereal leaf beetle
Oulema melanopus
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Infraorder: Cucujiformia
Family: Chrysomelidae
Subfamily: Criocerinae
Tribe: Lemini
Genus: Oulema
Species:
O. melanopus
Binomial name
Oulema melanopus

Life history edit

One generation of this beetle is produced a year. Adults feed before winter and spend most of their overwintering time in protected areas such as wind rows, crop stubble, and tree bark crevices.[1][2][3] Adults mate once the temperature warms to above 9–10 degrees Celsius (or 44.6 degrees F) [1][4] and females have a relatively long laying period (about 45–60 days), when they deposit eggs on the undersides of leaves.[1][2] The larvae hatch in 7–15 days,[3] and start the most damaging eating of the entire lifecycle. These larvae mature in 12–20 days.[3] Larvae are the greatest threat to crops, as they eat the superficial layer of leaves, hindering the leaves' photosynthetic potential.[2][5] According to Kon, Zabik, Webster, and Leavitt, a chemical factor attracts the beetles to leaves, and that chemical factor is directly related to hydrophobicity.[2][6] Pupation occurs in soil, with the adults emerging in 20–25 days,[3][7] ready to start the cycle again.[3][8]

Eggs are cylindrical and round, about 0.9 mm long and 0.4 mm wide. Eggs are often laid along the midvein on the undersides of leaves. They are bright yellow at first and darken over time, and are partially black when the larvae emerge.[1][2][9][10][11]

The larva appears white or yellow, is hump-backed, and has a black head and six small legs. It has a defense mechanism in which it smears excrement on its body to mask its vibrant color and deter predators. This gives it a shiny black appearance, as opposed to yellow or white.[1][2][3][9][10][12]

Adults, on average, are about 5 mm long and have dark-blue wing covers and red legs. Their thoraces range in color from red to orange to reddish brown.[2][3][10][12] The biggest distinction between male and female O. melanopus is the difference in shape of the first abdominal segment. The male's segment is more narrowly rounded and flat or concave, and it is more broadly rounded and convex in the female.[7]

Pupas are rarely seen in fields, as they are dormant at that time. Pupae are about 5 mm in length and are yellow, also darkening with time.[9]

Habitat edit

O. melanopus is native to Europe and Asia, but it has become much more common in the world.[2][3][9][10] In North America, it was first spotted in Berrien County, Michigan, in 1962.[2][13][14] Since then, it has spread through the Midwest to the East Coast, and is making its way westward.[2] Significant populations are found in Virginia, North Carolina,[3] Utah, Montana, North Dakota,[10] and Missouri and Iowa.[15] Environmental conditions such as temperature and humidity drastically affect the O. melanopus population for that year. A cold spring favors the host plant, whereas a warm spring favors the leaf beetle.[16] An increase in the general temperature of the planet may allow O. melanopus to spread into Canada.[17] More recent surveys have shown that O. melanopus has indeed arrived in Canada; in 2006, it was present in 11.1% of fields, and in 2009, in 33.3% of fields in southern Alberta.[18]

Locally, adults spread to the exterior of fields during their overwinter. Larvae tend to stay on the outside of crop fields, but are also found in the center. Local populations are never homogenously distributed, hotspots and empty places occur in each field.[14][19]

Food edit

O. melanopus consumes nearly all cereal crops, but has a strong affinity for oats, barley, and rye, and its favorite host is wheat.[1][13][20] Alternatives are corn, sorghum, and sudangrass for adults, and wild oats, quackgrass, timothy, canary grass, reed canary grass, annual and perennial ryegrass, foxtail, orchard grass, wild rye, smooth brome, and fescues for the whole lifespan.[5][10][20] The physical symptoms of the plant caused by them are thin, long lines where the upper epidermis of the leaf has been eaten. Since the beetle is migratory when it eats, it is not consistent within a field. In Michigan, entire fields are rarely affected and the situation is most likely the same in the Midwest.[2] A field of plants looks weathered and old, but is never completely destroyed. Damage is usually no more than 40% total.[9]

When a herbivore consumes a plant, it releases volatile organic compounds (VOCs). Because VOCs are a chemical signal that attract some predators, the female O. melanopus is repelled by the chemicals for her own and the safety of her progeny. Males are deterred, but do not change eating habits.[21][22][23]

To determine the eating habits of O. melanopus, scientists conducted an experiment using different media. They took agar gel infused with pea and barley extracts, and noted the resulting reaction. When used alone, both pea extract, which is not a desired food for the beetle, and barley extract, which is an alternate source, produced a weakening or halting of consumption. A combination of both, however, incited a small feeding response. Most likely, a secondary compound in barley incites an eating response, perhaps when a lack of desired food is present.[6]

Control edit

Biological solutions edit

Scientists have had success in labs with a few types of nematode, Steinernema feltiae B30, S. carpocapsae C101, and Hetero-rhabditis bacteriophora D54. Nematodes attack the adults that overwinter in the soil, preventing them from reproducing in the spring. S. carpocapsae C101 was found to be the most effective, and even proved to be an effective alternative to pesticides. Each of the nematodes, however, was sensitive to temperature, implying that some strains would work better than others due to the temperature. Since the spread of O. melanopus is so great, a consistently important factor to consider is the temperature when selecting which strain is the most effective for the desired location.[8]

Also, the hormone secreted by the males attracts the beetles into a trap, where they can be removed from the site.[24]

For the adult individuals, which feed on leaves, a few options exist to control populations. The first is Hyalomyodes triangulifer, a tachinid fly that parasitizes adults of O. melanopus.[10]

Another biological control consists of larval parasites; Diaparsis carnifer, Lemophagus curtis, and Tetrastichus julis are wasps that do this [10] D. carnifer and L. curtis both consume the O. melanopus larvae, and T. julis lays eggs inside of the body of the O. melanopus larvae. Specifically, T. julis does not seem to pose too much risk to the crops themselves, but is extremely effective at dispatching large populations, around 90%.[4][9][10][13][18][25] With all parasitic wasps in general, some experiments are proving that spraying a sugar solution on the fields encourages predators of O. melanopus to grow fast and hearty, so they can better kill off the population in the field.[26]

Anaphes flavipes is an egg parasitoid that lays its eggs inside of the O. melanopus egg, killing it in the process. Effectiveness is around 90%. It is a good control agent because it is hearty and its lifecycle is synchronous with that of O. melanopus, the disadvantage being that it is not host-specific, and can cause other unforeseen deaths in other bugs, disrupting the balance of the ecosystem.[4][9][18]>.

The Coccinellidae ladybug beetles are known to eat the eggs and larvae of O. melanopus, and are effective in some locations.[10]

Other solutions edit

Even without human intervention, O. melanopus has experienced a decline in the United States due to general weather conditions such as drought or excessive rainfall.[4] In the early days of outbreak in the United States, California experimented with quarantine as the first option. Any material suspected to contain O. melanopus was not allowed into California.[27] O. melanopus populations traveling in hay can be suppressed by compressing the hay into bales.[28]

Genetically modified plants are still another option for control. Meissle et al. found that mortality of O. melanopus on Cry3Bb1 transgenic maize was double that of the wild type. Many transgenic plants seek to change the physical properties of the plant, making adhering eggs a difficult task.[29]

In Europe, where the species is native, scientists have experimented with several pesticides. In one experiment, four pesticides belonging to two groups (organophosphates and pyrethroids) were tested to see their effects on the beetles' numbers. These were tested at several concentrations and mixtures. The chemical Vantex was superior, but the other pesticides were averaging 80% efficiency and were not to be counted out.[19] With many pesticides, farmers must be cautious not to spray too early, because the eggs will not be affected much, and pesticide use may actually increase the numbers of O. melanopus because predators are killed.[9] The optimum time to begin spraying is when about 50% of the eggs have hatched. An alternative is spraying when the adults are laying their eggs, which is also shown to be effective.[9][11][30][31][32]

References edit

  1. ^ a b c d e f Berchert, D.M.; Magarey, R.D.; Fowler, G.A. (PDF). www.nappfast.org. NC State University. Archived from the original (PDF) on 2011-07-27. Retrieved 2013-10-06.
  2. ^ a b c d e f g h i j k DiFonzo, C. (2009). "Cereal Leaf Beetle". Michigan: Michigan State University Extension. Retrieved 2013-09-10.
  3. ^ a b c d e f g h i Herbert Jr., D.A.; Van Duyn, J.W. (2009). "Cereal Leaf Beetle: Biology and Management" (PDF). Virginia Tech. Retrieved 2013-09-08.
  4. ^ a b c d Blodgett, S.; Tharp, C.I.; Kephart, K. (2004). (PDF). Montana State University. Archived from the original (PDF) on 2018-02-27. Retrieved 2018-02-26.
  5. ^ a b Roberts, D. (2006). . Oregon State University. Archived from the original on 2013-12-21. Retrieved 2013-10-07.
  6. ^ a b Kon, R.T.; Zabik, M.J.; Webster, J.A.; Leavitt, R.A. (1978). "Cereal leaf beetle response to biochemicals from barley and pea seedlings. I. Crude extract, hydrophobic and hydrophilic fractions". Journal of Chemical Ecology. 4 (5): 511–522. Bibcode:1978JCEco...4..511K. doi:10.1007/bf00988915. S2CID 39914107.
  7. ^ a b White, R.E. (1993). . Agricultural Research Service Technical Bulletin. Archived from the original on 2013-12-03. Retrieved 2013-09-10.
  8. ^ a b Laznik, Z.; Toth, T.; Lakatos, T.; Vidrih, M.; Trdan, S. (2009). "Oulema melanopus(L.) (Coleopters: Chrysomelidae) Adults are Susceptible to Entomopathogenic Nematodes (Rhabditida) Attack: Results From a Laboratory Study". Journal of Plant Diseases and Protection. 117 (1): 30–32. doi:10.1007/BF03356330. S2CID 89385660. Archived from the original on 2013-11-04. Retrieved 2013-09-16.
  9. ^ a b c d e f g h i Philips, C.R.; Herbert, D.A.; Kuhar, T.P.; Reisig, D.D.; Thomason, W.E.; Malone, S. (2011). "Fifty Years of Cereal Leaf Beetle in the U.S.: An Update on Its Biology, Managemente, and Current Research". Journal of Integrated Pest Management. 2 (2): 1–5. doi:10.1603/ipm11014. hdl:10919/89561.
  10. ^ a b c d e f g h i j Glogoza, P (2002). "North Dakota Small Grain Insects: Cereal Leaf Beetle" (PDF). North Dakota State University. Retrieved 2013-09-18.
  11. ^ a b Hammond, R.B.; Michel, A.; Eisley, J.B. (PDF). FACT SHEET Agriculture and Natural Resources. Ohio State University. Archived from the original (PDF) on 2011-01-13. Retrieved 2013-10-13.
  12. ^ a b Tooker, J. (2009). "Entomological Notes: Cereal Leaf Beetle". Pennsylvania State University. Retrieved 2013-09-19.
  13. ^ a b c Olfert, O.; Weiss, R.M.; Woods, S.; Phillip, H.; Dosdall, L. (2004). "Potential distribution and Relative Abundance of an Invasive Cereal Crop Pest, Oulema melanopus (Coleoptera: Chrysomelidae), in Canada". The Canadian Entomologist. 136 (2): 277–287. doi:10.4039/n03-073. S2CID 84220913.
  14. ^ a b Reay-Jones, F.P.F. (2012). "Spatial Analysis of the Cereal Leaf Beetle (Coleoptera: Chrysomelidae) in Wheat". Environmental Entomology. 41 (6): 1516–1526. doi:10.1603/en12103. PMC 4535328. PMID 25843577.
  15. ^ Bailey, W.C.; Carlson, C.E.; Puttler, B.; Stoltenow, C.R. (1991). "Expansion of the Range of the Cereal Leaf Beetle, Oulema melanopus (L.) (Coleoptera: Chrysomelidae), in Missouri and Iowa". Journal of the Kansas Entomological Society. 64 (4): 455–457. ISSN 0022-8567. JSTOR 25085315.
  16. ^ Gutierrez, A.P.; Denton, W.H.; Shade, R.; Maltby, H.; Burger, T.; Moorehead, G. (1974). "The Within-Field Dynamics of the Cereal Leaf Beetle (Oulema melanopus (L.)) in Wheat and Oats". Journal of Animal Ecology. 43 (3): 627–640. Bibcode:1974JAnEc..43..627G. doi:10.2307/3527. ISSN 0021-8790. JSTOR 3527.
  17. ^ Olfert, O.; Weiss, R.M. (2005). "Impact of Climate Change on Potential Distributions and Relative Abundances of Oulema melanupus, Meligethes viridescens and Ceutorhynchus obstrictus in Canada". Agriculture, Ecosystems & Environment. 113 (1–4): 295–301. doi:10.1016/j.agee.2005.10.017. ISSN 0167-8809.
  18. ^ a b c Dosdall, L.M.; Cárcamo, H.; Olfert, O.; Meers, S.; Hartley, S.; Gavloski, J. (May 2011). "Insect invasions of agroecosystems in the western Canadian prairies: case histories, patterns, and implications for ecosystem function". Biological Invasions. 13 (5): 1135–1149. Bibcode:2011BiInv..13.1135D. doi:10.1007/s10530-011-9951-8. ISSN 1387-3547. S2CID 19577499.
  19. ^ a b Tanaskovic, S.; Madic, M.; Durovic, D.; Knezavic, D.; Vukajlovic., F. (2012). "Susceptibility of Cereal Leaf Beetle (Oulema Melanopa) in Winter Wheat to Various Foliar Insecticides in Western Serbia Region" (PDF). Romanian Agricultural Research. 29. ISSN 2067-5720. Retrieved 2013-09-13.
  20. ^ a b Bieńkowski, A.O. (March 2010). "Feeding behavior of leaf beetles (Coleoptera, Chrysomelidae)". Entomological Review. 90 (1): 1–10. doi:10.1134/S001387381001001X. ISSN 0013-8738. S2CID 30500119.
  21. ^ Delaney, K. J.; Wawrzyniak, M.; Lemanczyk, G.; Wrzesinska, D.; Piesik, D. (May 2013). "Synthetic cis-jasmone exposure induces wheat and barley volatiles that repel the pest cereal leaf beetle, Oulema melanopus L". J Chem Ecol. 39 (5): 620–9. Bibcode:2013JCEco..39..620D. doi:10.1007/s10886-013-0281-4. ISSN 1573-1561. PMID 23588742. S2CID 386679.
  22. ^ Piesik, D.; Lemnczyk, G.; Skoczek, A.; Lamparski, R.; Bocianowski, J.; Kotwica, K.; Delaney, K. J. (2011). "Fusarium infection in maize: Volatile induction of infected and neighboring uninfected plants has the potential to attract a pest cereal leaf beetle, Oulema melanopus". Journal of Plant Physiology. 168 (13): 1534–1542. doi:10.1016/j.jplph.2011.01.032. ISSN 0176-1617. PMID 21492953.
  23. ^ Piesik, D.; Panka, D.; Delaney, K. J.; Skoczek, A.; Lamparski, R.; Weaver, D. K. (2011). "Cereal crop volatile organic compound induction after mechanical injury, beetle herbivory (Oulema spp.), or fungal infection (Fusarium spp.)". Journal of Plant Physiology. 168 (9): 878–886. doi:10.1016/j.jplph.2010.11.010. ISSN 0176-1617. PMID 21208684.
  24. ^ Rao, S.; Cosse, A.A.; Zilkowski, B.W.; Bartelt, R.J. (2003). "Aggregation Pheromone of the Cereal Leaf Beetle: Field Evaluation and Emission From Males in the Laboratory". Journal of Chemical Ecology. 29 (9): 2165–2175. doi:10.1023/a:1025698821635. PMID 14584683. S2CID 3070476.
  25. ^ Evans, E.W.; Karren, J.B.; Israelsen, C.E. (2006). "Interactions over time between cereal leaf beetle (Coleoptera: Chrysomelidae) and larval parasitoid Tetrastichus julis (Hymenoptera: Eulophidae) in Utah". Journal of Economic Entomology. 99 (6): 1967–1973. doi:10.1603/0022-0493-99.6.1967. ISSN 0022-0493. PMID 17195661. S2CID 198121977.
  26. ^ Evans, E.W.; Bowling, P.D.; Anderson, M.R. (2010). "Targeted sugar provision promotes parasitism of the cereal leaf beetle Oulema melanopus [electronic resource]". Agricultural and Forest Entomology. 12 (1): 41–47. doi:10.1111/j.1461-9563.2009.00448.x. ISSN 1461-9555. S2CID 84502564.
  27. ^ California Department of Food and Agriculture (2003). . California Department of Food and Agriculture. Archived from the original on 2013-12-21. Retrieved 2013-09-13.
  28. ^ Yokoyama, V.Y. (2011). "Approved Quarantine Treatment for Hessian Fly (Diptera: Cecidomyiidae) in Large-Size Hay Bales and Hessian Fly and Cereal Leaf Beetle (Coleoptera: Chrysomelidae) Control by Bale Compression". Journal of Economic Entomology. 104 (3): 792–798. doi:10.1603/ec10339. ISSN 0022-0493. PMID 21735895. S2CID 6083431.
  29. ^ Meissle, M.; Knecht, S.; Waldburger, M.; Romeis, J. (2012). "Sensitivity of the cereal leaf beetle Oulema melanopus (Coleoptera:Chrysomelidae) to Bt maize-expressed Cry3Bb1 and Cry1Ab". Arthropod-Plant Interactions. 6 (2): 203–211. Bibcode:2012APInt...6..203M. doi:10.1007/s11829-011-9178-8. S2CID 14038361.
  30. ^ Buntin, G.D.; Flanders, K.L.; Slaughter, R.W.; DeLamar, Z.D. (2004). "Damage loss assessment and control of the cereal leaf beetle (Coleoptera: chrysomelidae) in winter wheat". Journal of Economic Entomology. 97 (2): 374–382. doi:10.1603/0022-0493-97.2.374. ISSN 0022-0493. PMID 15154458. S2CID 198127325.
  31. ^ Buntin, G.D. (2000). "3" (PDF). In Robert K.D. Peterson and Leon G. Higly (ed.). Biotic Stress and Yield Loss. Boca Raton: CRC Press. pp. 34–52. ISBN 978-0-8493-1145-1.
  32. ^ Ruppel, R.F. (1974). "A Test of Insecticides against the Cereal Leaf Beetle (Coleoptera: Chrysomelidae)". Journal of the Kansas Entomological Society. 47 (3): 412–415. ISSN 0022-8567. JSTOR 25082669.

External links edit

  •   Media related to Oulema melanopus at Wikimedia Commons
  •   Data related to Oulema melanopus at Wikispecies

January 01, 1970
cereal, leaf, beetle, cereal, leaf, beetle, oulema, melanopus, significant, crop, pest, described, carl, linnaeus, 1758, oulema, melanopus, scientific, classification, domain, eukaryota, kingdom, animalia, phylum, arthropoda, class, insecta, order, coleoptera,. The cereal leaf beetle Oulema melanopus is a significant crop pest described by Carl Linnaeus in 1758 Cereal leaf beetle Oulema melanopus Scientific classification Domain Eukaryota Kingdom Animalia Phylum Arthropoda Class Insecta Order Coleoptera Infraorder Cucujiformia Family Chrysomelidae Subfamily Criocerinae Tribe Lemini Genus Oulema Species O melanopus Binomial name Oulema melanopus Linnaeus 1758 Contents 1 Life history 2 Habitat 3 Food 4 Control 4 1 Biological solutions 4 2 Other solutions 5 References 6 External linksLife history editOne generation of this beetle is produced a year Adults feed before winter and spend most of their overwintering time in protected areas such as wind rows crop stubble and tree bark crevices 1 2 3 Adults mate once the temperature warms to above 9 10 degrees Celsius or 44 6 degrees F 1 4 and females have a relatively long laying period about 45 60 days when they deposit eggs on the undersides of leaves 1 2 The larvae hatch in 7 15 days 3 and start the most damaging eating of the entire lifecycle These larvae mature in 12 20 days 3 Larvae are the greatest threat to crops as they eat the superficial layer of leaves hindering the leaves photosynthetic potential 2 5 According to Kon Zabik Webster and Leavitt a chemical factor attracts the beetles to leaves and that chemical factor is directly related to hydrophobicity 2 6 Pupation occurs in soil with the adults emerging in 20 25 days 3 7 ready to start the cycle again 3 8 Eggs are cylindrical and round about 0 9 mm long and 0 4 mm wide Eggs are often laid along the midvein on the undersides of leaves They are bright yellow at first and darken over time and are partially black when the larvae emerge 1 2 9 10 11 The larva appears white or yellow is hump backed and has a black head and six small legs It has a defense mechanism in which it smears excrement on its body to mask its vibrant color and deter predators This gives it a shiny black appearance as opposed to yellow or white 1 2 3 9 10 12 Adults on average are about 5 mm long and have dark blue wing covers and red legs Their thoraces range in color from red to orange to reddish brown 2 3 10 12 The biggest distinction between male and female O melanopus is the difference in shape of the first abdominal segment The male s segment is more narrowly rounded and flat or concave and it is more broadly rounded and convex in the female 7 Pupas are rarely seen in fields as they are dormant at that time Pupae are about 5 mm in length and are yellow also darkening with time 9 Habitat editO melanopus is native to Europe and Asia but it has become much more common in the world 2 3 9 10 In North America it was first spotted in Berrien County Michigan in 1962 2 13 14 Since then it has spread through the Midwest to the East Coast and is making its way westward 2 Significant populations are found in Virginia North Carolina 3 Utah Montana North Dakota 10 and Missouri and Iowa 15 Environmental conditions such as temperature and humidity drastically affect the O melanopus population for that year A cold spring favors the host plant whereas a warm spring favors the leaf beetle 16 An increase in the general temperature of the planet may allow O melanopus to spread into Canada 17 More recent surveys have shown that O melanopus has indeed arrived in Canada in 2006 it was present in 11 1 of fields and in 2009 in 33 3 of fields in southern Alberta 18 Locally adults spread to the exterior of fields during their overwinter Larvae tend to stay on the outside of crop fields but are also found in the center Local populations are never homogenously distributed hotspots and empty places occur in each field 14 19 Food editO melanopus consumes nearly all cereal crops but has a strong affinity for oats barley and rye and its favorite host is wheat 1 13 20 Alternatives are corn sorghum and sudangrass for adults and wild oats quackgrass timothy canary grass reed canary grass annual and perennial ryegrass foxtail orchard grass wild rye smooth brome and fescues for the whole lifespan 5 10 20 The physical symptoms of the plant caused by them are thin long lines where the upper epidermis of the leaf has been eaten Since the beetle is migratory when it eats it is not consistent within a field In Michigan entire fields are rarely affected and the situation is most likely the same in the Midwest 2 A field of plants looks weathered and old but is never completely destroyed Damage is usually no more than 40 total 9 When a herbivore consumes a plant it releases volatile organic compounds VOCs Because VOCs are a chemical signal that attract some predators the female O melanopus is repelled by the chemicals for her own and the safety of her progeny Males are deterred but do not change eating habits 21 22 23 To determine the eating habits of O melanopus scientists conducted an experiment using different media They took agar gel infused with pea and barley extracts and noted the resulting reaction When used alone both pea extract which is not a desired food for the beetle and barley extract which is an alternate source produced a weakening or halting of consumption A combination of both however incited a small feeding response Most likely a secondary compound in barley incites an eating response perhaps when a lack of desired food is present 6 Control editBiological solutions edit Scientists have had success in labs with a few types of nematode Steinernema feltiae B30 S carpocapsae C101 and Hetero rhabditis bacteriophora D54 Nematodes attack the adults that overwinter in the soil preventing them from reproducing in the spring S carpocapsae C101 was found to be the most effective and even proved to be an effective alternative to pesticides Each of the nematodes however was sensitive to temperature implying that some strains would work better than others due to the temperature Since the spread of O melanopus is so great a consistently important factor to consider is the temperature when selecting which strain is the most effective for the desired location 8 Also the hormone secreted by the males attracts the beetles into a trap where they can be removed from the site 24 For the adult individuals which feed on leaves a few options exist to control populations The first is Hyalomyodes triangulifer a tachinid fly that parasitizes adults of O melanopus 10 Another biological control consists of larval parasites Diaparsis carnifer Lemophagus curtis and Tetrastichus julis are wasps that do this 10 D carnifer and L curtis both consume the O melanopus larvae and T julis lays eggs inside of the body of the O melanopus larvae Specifically T julis does not seem to pose too much risk to the crops themselves but is extremely effective at dispatching large populations around 90 4 9 10 13 18 25 With all parasitic wasps in general some experiments are proving that spraying a sugar solution on the fields encourages predators of O melanopus to grow fast and hearty so they can better kill off the population in the field 26 Anaphes flavipes is an egg parasitoid that lays its eggs inside of the O melanopus egg killing it in the process Effectiveness is around 90 It is a good control agent because it is hearty and its lifecycle is synchronous with that of O melanopus the disadvantage being that it is not host specific and can cause other unforeseen deaths in other bugs disrupting the balance of the ecosystem 4 9 18 gt The Coccinellidae ladybug beetles are known to eat the eggs and larvae of O melanopus and are effective in some locations 10 Other solutions edit Even without human intervention O melanopus has experienced a decline in the United States due to general weather conditions such as drought or excessive rainfall 4 In the early days of outbreak in the United States California experimented with quarantine as the first option Any material suspected to contain O melanopus was not allowed into California 27 O melanopus populations traveling in hay can be suppressed by compressing the hay into bales 28 Genetically modified plants are still another option for control Meissle et al found that mortality of O melanopus on Cry3Bb1 transgenic maize was double that of the wild type Many transgenic plants seek to change the physical properties of the plant making adhering eggs a difficult task 29 In Europe where the species is native scientists have experimented with several pesticides In one experiment four pesticides belonging to two groups organophosphates and pyrethroids were tested to see their effects on the beetles numbers These were tested at several concentrations and mixtures The chemical Vantex was superior but the other pesticides were averaging 80 efficiency and were not to be counted out 19 With many pesticides farmers must be cautious not to spray too early because the eggs will not be affected much and pesticide use may actually increase the numbers of O melanopus because predators are killed 9 The optimum time to begin spraying is when about 50 of the eggs have hatched An alternative is spraying when the adults are laying their eggs which is also shown to be effective 9 11 30 31 32 References edit a b c d e f Berchert D M Magarey R D Fowler G A PEST ASSESSMENT Cereal Leaf Beetle Oulema melanopus L Coleoptera Chrysomelidae PDF www nappfast org NC State University Archived from the original PDF on 2011 07 27 Retrieved 2013 10 06 a b c d e f g h i j k DiFonzo C 2009 Cereal Leaf Beetle Michigan Michigan State University Extension Retrieved 2013 09 10 a b c d e f g h i Herbert Jr D A Van Duyn J W 2009 Cereal Leaf Beetle Biology and Management PDF Virginia Tech Retrieved 2013 09 08 a b c d Blodgett S Tharp C I Kephart K 2004 Cereal Leaf Beetle PDF Montana State University Archived from the original PDF on 2018 02 27 Retrieved 2018 02 26 a b Roberts D 2006 Cereal Leaf Beetle Oregon State University Archived from the original on 2013 12 21 Retrieved 2013 10 07 a b Kon R T Zabik M J Webster J A Leavitt R A 1978 Cereal leaf beetle response to biochemicals from barley and pea seedlings I Crude extract hydrophobic and hydrophilic fractions Journal of Chemical Ecology 4 5 511 522 Bibcode 1978JCEco 4 511K doi 10 1007 bf00988915 S2CID 39914107 a b White R E 1993 A Revision of the Subfamily Criocerinae Chrysomelidae of North America North of Mexico Agricultural Research Service Technical Bulletin Archived from the original on 2013 12 03 Retrieved 2013 09 10 a b Laznik Z Toth T Lakatos T Vidrih M Trdan S 2009 Oulema melanopus L Coleopters Chrysomelidae Adults are Susceptible to Entomopathogenic Nematodes Rhabditida Attack Results From a Laboratory Study Journal of Plant Diseases and Protection 117 1 30 32 doi 10 1007 BF03356330 S2CID 89385660 Archived from the original on 2013 11 04 Retrieved 2013 09 16 a b c d e f g h i Philips C R Herbert D A Kuhar T P Reisig D D Thomason W E Malone S 2011 Fifty Years of Cereal Leaf Beetle in the U S An Update on Its Biology Managemente and Current Research Journal of Integrated Pest Management 2 2 1 5 doi 10 1603 ipm11014 hdl 10919 89561 a b c d e f g h i j Glogoza P 2002 North Dakota Small Grain Insects Cereal Leaf Beetle PDF North Dakota State University Retrieved 2013 09 18 a b Hammond R B Michel A Eisley J B Cereal Leaf Beetle PDF FACT SHEET Agriculture and Natural Resources Ohio State University Archived from the original PDF on 2011 01 13 Retrieved 2013 10 13 a b Tooker J 2009 Entomological Notes Cereal Leaf Beetle Pennsylvania State University Retrieved 2013 09 19 a b c Olfert O Weiss R M Woods S Phillip H Dosdall L 2004 Potential distribution and Relative Abundance of an Invasive Cereal Crop Pest Oulema melanopus Coleoptera Chrysomelidae in Canada The Canadian Entomologist 136 2 277 287 doi 10 4039 n03 073 S2CID 84220913 a b Reay Jones F P F 2012 Spatial Analysis of the Cereal Leaf Beetle Coleoptera Chrysomelidae in Wheat Environmental Entomology 41 6 1516 1526 doi 10 1603 en12103 PMC 4535328 PMID 25843577 Bailey W C Carlson C E Puttler B Stoltenow C R 1991 Expansion of the Range of the Cereal Leaf Beetle Oulema melanopus L Coleoptera Chrysomelidae in Missouri and Iowa Journal of the Kansas Entomological Society 64 4 455 457 ISSN 0022 8567 JSTOR 25085315 Gutierrez A P Denton W H Shade R Maltby H Burger T Moorehead G 1974 The Within Field Dynamics of the Cereal Leaf Beetle Oulema melanopus L in Wheat and Oats Journal of Animal Ecology 43 3 627 640 Bibcode 1974JAnEc 43 627G doi 10 2307 3527 ISSN 0021 8790 JSTOR 3527 Olfert O Weiss R M 2005 Impact of Climate Change on Potential Distributions and Relative Abundances of Oulema melanupus Meligethes viridescens and Ceutorhynchus obstrictus in Canada Agriculture Ecosystems amp Environment 113 1 4 295 301 doi 10 1016 j agee 2005 10 017 ISSN 0167 8809 a b c Dosdall L M Carcamo H Olfert O Meers S Hartley S Gavloski J May 2011 Insect invasions of agroecosystems in the western Canadian prairies case histories patterns and implications for ecosystem function Biological Invasions 13 5 1135 1149 Bibcode 2011BiInv 13 1135D doi 10 1007 s10530 011 9951 8 ISSN 1387 3547 S2CID 19577499 a b Tanaskovic S Madic M Durovic D Knezavic D Vukajlovic F 2012 Susceptibility of Cereal Leaf Beetle Oulema Melanopa in Winter Wheat to Various Foliar Insecticides in Western Serbia Region PDF Romanian Agricultural Research 29 ISSN 2067 5720 Retrieved 2013 09 13 a b Bienkowski A O March 2010 Feeding behavior of leaf beetles Coleoptera Chrysomelidae Entomological Review 90 1 1 10 doi 10 1134 S001387381001001X ISSN 0013 8738 S2CID 30500119 Delaney K J Wawrzyniak M Lemanczyk G Wrzesinska D Piesik D May 2013 Synthetic cis jasmone exposure induces wheat and barley volatiles that repel the pest cereal leaf beetle Oulema melanopus L J Chem Ecol 39 5 620 9 Bibcode 2013JCEco 39 620D doi 10 1007 s10886 013 0281 4 ISSN 1573 1561 PMID 23588742 S2CID 386679 Piesik D Lemnczyk G Skoczek A Lamparski R Bocianowski J Kotwica K Delaney K J 2011 Fusarium infection in maize Volatile induction of infected and neighboring uninfected plants has the potential to attract a pest cereal leaf beetle Oulema melanopus Journal of Plant Physiology 168 13 1534 1542 doi 10 1016 j jplph 2011 01 032 ISSN 0176 1617 PMID 21492953 Piesik D Panka D Delaney K J Skoczek A Lamparski R Weaver D K 2011 Cereal crop volatile organic compound induction after mechanical injury beetle herbivory Oulema spp or fungal infection Fusarium spp Journal of Plant Physiology 168 9 878 886 doi 10 1016 j jplph 2010 11 010 ISSN 0176 1617 PMID 21208684 Rao S Cosse A A Zilkowski B W Bartelt R J 2003 Aggregation Pheromone of the Cereal Leaf Beetle Field Evaluation and Emission From Males in the Laboratory Journal of Chemical Ecology 29 9 2165 2175 doi 10 1023 a 1025698821635 PMID 14584683 S2CID 3070476 Evans E W Karren J B Israelsen C E 2006 Interactions over time between cereal leaf beetle Coleoptera Chrysomelidae and larval parasitoid Tetrastichus julis Hymenoptera Eulophidae in Utah Journal of Economic Entomology 99 6 1967 1973 doi 10 1603 0022 0493 99 6 1967 ISSN 0022 0493 PMID 17195661 S2CID 198121977 Evans E W Bowling P D Anderson M R 2010 Targeted sugar provision promotes parasitism of the cereal leaf beetle Oulema melanopus electronic resource Agricultural and Forest Entomology 12 1 41 47 doi 10 1111 j 1461 9563 2009 00448 x ISSN 1461 9555 S2CID 84502564 California Department of Food and Agriculture 2003 Cereal Leaf Beetle California Department of Food and Agriculture Archived from the original on 2013 12 21 Retrieved 2013 09 13 Yokoyama V Y 2011 Approved Quarantine Treatment for Hessian Fly Diptera Cecidomyiidae in Large Size Hay Bales and Hessian Fly and Cereal Leaf Beetle Coleoptera Chrysomelidae Control by Bale Compression Journal of Economic Entomology 104 3 792 798 doi 10 1603 ec10339 ISSN 0022 0493 PMID 21735895 S2CID 6083431 Meissle M Knecht S Waldburger M Romeis J 2012 Sensitivity of the cereal leaf beetle Oulema melanopus Coleoptera Chrysomelidae to Bt maize expressed Cry3Bb1 and Cry1Ab Arthropod Plant Interactions 6 2 203 211 Bibcode 2012APInt 6 203M doi 10 1007 s11829 011 9178 8 S2CID 14038361 Buntin G D Flanders K L Slaughter R W DeLamar Z D 2004 Damage loss assessment and control of the cereal leaf beetle Coleoptera chrysomelidae in winter wheat Journal of Economic Entomology 97 2 374 382 doi 10 1603 0022 0493 97 2 374 ISSN 0022 0493 PMID 15154458 S2CID 198127325 Buntin G D 2000 3 PDF In Robert K D Peterson and Leon G Higly ed Biotic Stress and Yield Loss Boca Raton CRC Press pp 34 52 ISBN 978 0 8493 1145 1 Ruppel R F 1974 A Test of Insecticides against the Cereal Leaf Beetle Coleoptera Chrysomelidae Journal of the Kansas Entomological Society 47 3 412 415 ISSN 0022 8567 JSTOR 25082669 External links edit nbsp Media related to Oulema melanopus at Wikimedia Commons nbsp Data related to Oulema melanopus at Wikispecies Retrieved from https en wikipedia org w index php title Cereal leaf beetle amp oldid 1214465549, wikipedia, wiki, book, books, library,

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