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... Compounds that are structurally closely related to the western corn rootworm (WCR) (Diabrotica v. virgifera, Coleoptera: Chrysomelidae) pheromone were prepared and screened for biological activity in the field, presented alone or in combination with the pheromone 8-methyldecan-2-yl propanoate. None of the synthetic compounds showed attraction when presented alone. However, when presented in combin ...
DNA; DNA primers; Diabrotica; Elateridae; Eptesicus fuscus; Hypena; Lasiurus borealis; Lygus; Spodoptera; Stenolophus; adverse effects; agriculture; arthropods; corn; crop damage; design; detection; diet; ecosystems; environment; feces; harness; human health; insecticides; learning; moths; pest control; rootworms; sampling; Corn Belt region
Abstract:
... To meet growing global food demand, producers are actively searching for ways tocrop yield. One way to boost yield is to reduce arthropod damage. However, insecticides are becoming less effective and can have detrimental effects on human health and the environment. Learning how to harness natural pest control is one way to reduce arthropod damage to crops and avoid adverse effects of insecticide u ...
Diabrotica; amino acids; antinutritional factors; chemical species; corn; dietary minerals; double-stranded RNA; fatty acids; field experimentation; forage; genetically modified plants; glufosinate resistance; growing season; herbicides; mannose-6-phosphate isomerase; phosphinothricin acetyltransferase; secondary metabolites; vitamins; Canada; United States
Abstract:
... DP23211 maize was genetically modified (GM) to express DvSSJ1 double-stranded RNA and the IPD072Aa protein for control of corn rootworm (Diabrotica spp.). DP23211 maize also expresses the phosphinothricin acetyltransferase (PAT) protein for tolerance to glufosinate herbicide, and the phosphomannose isomerase (PMI) protein that was used as a selectable marker. A multi-location field trial was condu ...
... Corn rootworm (Diabrotica spp.) has become the most concern and widespread insect pest of corn (Zea mays L.) production in North America. Two field experiments were conducted to assess the agronomic and yield performance of transgenic rootworm trait, Bacillus thuringiensis (Bt) Cry3Bb, seed-coating treatment, and a soil-applied insecticide under natural corn rootworm infestation. Experiment 1 comp ...
... The concept of encapsulating semiochemicals into a starch matrix is being studied for potential use in corn rootworm (CRW) management programs. During 1987, experiments were conducted to determine: 1) If volatile plant-derived Diabrotica spp. attractants could be encapsulated in a starch borate matrix (SBM), and 2) If various SBM-semiochemical formulations would attract Diabrotica species over tim ...
Zea mays; transgenic plants; Bacillus thuringiensis; pest resistance; rootworms; Diabrotica; nontarget organisms; Collembola; soil arthropods; species diversity; community structure; population density; Iowa; Illinois
Abstract:
... Springtails are an integral and beneficial part of the soil community. As part of an extensive study of the effect of rootworm Bt corn (Cry3Bb1) on nontarget invertebrates, we evaluated both the abundance and diversity of surface-active (epedaphic) and subsurface (euedaphic) springtails at Ames, IA, and Monmouth, IL, in 2-yr field trials during 2000-2002. Springtails were collected from pitfall tr ...
... The dispersion of root injury to Zea mays L. by corn rootworm, Diabrotica spp., larvae was characterized using geostatistics to determine the appropriate sampling distance to obtain independent estimates of root injury. We also investigated the effect of the root injury levels on the spatial dependence of root injury at three different spatial scales: large-scale study with 25-m sampling distance ...
... Coleomegilla maculata DeGeer is a polyphagous predator that is important for suppressing pest populations in corn. We evaluated the impact of Cry3Bb-expressing transgenic corn pollen (event MON863) on C. maculata fitness parameters in the laboratory. C. maculata larvae were fed mixtures of pollen containing 0, 25, 50, 75, or 100% transgenic pollen, aphids, or were not fed; and the duration of each ...
... Cropping systems that include forage legumes and small grains in addition to corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] can achieve similar or higher crop productivity and economic return than simpler corn–soybean rotations. We hypothesized that this rotation effect occurs regardless of the crop genotype planted and the herbicide and cultivation regime selected for weed management. To ...
... Corn rootworm can cause devastating effects to corn yields. The focus of this lesson is the ongoing research of scientists as they work to combat the resistance of corn rootworm to control measures. The importance of this research in developing Insect Resistance Management strategies is discussed. ...
... A 4-yr field investigation (1993-1996) to examine the compensatory root regrowth of 12 commonly grown maize hybrids after larval injury by corn rootworms, Diabrotica spp., was conducted at 2 locations in Illinois. Root injury ratings, root volume measurements taken in July and August, and root regrowth parameters were evaluated for their usefulness in predicting yield. Root ratings were as useful ...
... Corn engineered to produce the Cry3Bb1 protein from Bacillus thuringiensis (Bt) kumamotoensis has provided unprecedented control for corn rootworm (Diabrotica spp.). However, the Bt protein may be released in soil by root exudates or decaying plant residues that may affect soil organisms. Field studies were conducted to determine the abundance of surface and below-ground nontarget arthropods in fi ...
... Adoption of transgenic corn resistant to corn rootworm (CRW corn) was analyzed using a probit model with data from a survey of Indiana producers. Operator age, farm size, and regional and self-reported measures of rootworm pressure were all statistically significant in explaining adoption. In addition to these typical explanatory variables, market access variables, price variables, and insect resi ...