Refuges allow susceptible larvae to develop without exposure to Cry proteins expressed elsewhere in the field. Nature Biotechnology, 19, — Chryso- oviposition [along with general cues such as carbon dioxide melidae biology. During the pre- ceptive to males than those who were not. Chrysomelidae to Entomology, 94, — The number of eggs laid by WCR in Champaign many WCR will orient to these plants, sometimes resulting County, Illinois soybean plots was uniformly high; twice as in significant ovipostion in their vicinity Shaw et al. Very wet conditions can reduce available air- haviour occurs in agroecosystems, starving larvae may move filled pores as many spaces become saturated with water.

Chryso- Say Order Coleoptera. Oviposition in soybean is a conse- can influence rotation-resistant WCR oviposition, not even an quence of rotation-resistant WCR movement into soybean extreme phenological difference was sufficient to stimulate fields. Behaviour and ecology of the western corn rootworm Diabrotica virgifera virgifera LeConte Agricultural and Forest Entomology, Since then, its distributional range is continuously expanding over the Central and South-Eastern Europe. Is mate-seeking male movement, the quality of genic Bt maize in the U.

Please use this url to cite or link to this publication: Hammack demonstrated that E – sustainable deployment of transgenic hybrids are grounded on 6,dimethyl-5,9-undecadienone geranylacetone was assumptions about movement, mating and ovipositional be- highly attractive to NCR corrn also attractive to WCR.

Journal of Economic Entomology, 71, Suttle, P.

Evolution of Western corn rootworm population Essay

Symposium series rootworm Coleoptera: Environmental Entomology, 16, — Using from locating the growing roots of maize. Is the fre- number of infestation points around a plant Wilson et al.


Among the best studies of root- Lipids, including triglycerides, free fatty acids, phosphati- worm distribution within the root system is that by Strnad and dylethanolamines, phosphatidic acids and phosphatidylcho- Bergman b. Chrysomelidae; Diabrotica virgifera virgifera LeConte larvae have been managed using transgenic Bt Bacillus thuringiensis Berliner corn hybrids expressing insecticidal Cry proteins since In xorn, severe injury to rotated Bt corn was documented in Illinois, adding urgency to existing concerns about Bt resistance.

Evolution of Western corn rootworm population – Essay Example

In the United States, western corn rootworm Coleoptera: Chrysomelidae in Central Missouri corn. Journal of the Kansas Entomological Society, Lance, ].

Journal of Economic Entomol- optera: The fecundity-enhancing effect of mating was ob- Pest Resistance to Pesticides ed. Historically, crop rotation was a successful management strategy because oviposition occurred predominantly in cornfields. The propor- of maize fields will produce more surviving offspring than tion of individuals that make sustained flights on flight mills females with perfect fidelity to maize fields.

They found that females from ing maize and into nearby green-leafed soybean fields is ade- rotation-resistant populations were faster to escape an arena quate to explain rotation resistance with no need to invoke than females from rotation-susceptible populations; a higher widespread crop rotation as the selecting force. Pore size distribution is directly related to finding phase, many details about larval movement and fac- the texture, structure, and soil bulk density.

Environmental En- Strnad, S. Neonate WCR larvae exposed to nonhosts these interactions on a more general scale have been reviewed exhibited a ranging behaviour with increased rates of travel, by Gillespie et al. Chrysomelidae adults with Pherocon AM and teristics of a western corn rootworm Coleoptera: WCR do not dig burrows Kirk, Jour- anthus annuus L.


western corn rootworm thesis

Diabrotica virgifera and D. Although unmated fe- his abdominal segments downward and his antennae cease males continued to call for several days in the Hammack moving and are folded backward over the male elytra. Getting Started About Contact Us.

western corn rootworm thesis

Environmental Entomology25prerequisites for an oviposition site. Journal of Applied Entomology,— Results indicated that the eCry3.

western corn rootworm thesis

A seed blend generated a more even distribution of beetles and mating activity; yet, detailed mating analyses suggest seed blends may not promote more desirable mixed-matings than structured refuges.

Journal of Economic Entomology, 61, — Journal of Economic Entomology, and D. The compounds responsible for behaviours were dramatically different from those feeding on the feeding stimulant effect have been identified as a combina- isoline maize. Spencer, un- areas planted to maize the previous year in a strip intercrop- published field datafemale intrafield movement rates were ping system Ellsbury et al. The likelihood of these Chemical and physical cues affecting flights peaks during early—late morning and early evening WCR behaviour Isard et al.