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Full-Text Articles in Life Sciences
Effects Of A Corn Root Defense Substance On Western Corn Rootworm Diabrotica Virgifera Virgifera Leconte Larvae, Zixiao Zhao
Effects Of A Corn Root Defense Substance On Western Corn Rootworm Diabrotica Virgifera Virgifera Leconte Larvae, Zixiao Zhao
Department of Entomology: Dissertations, Theses, and Student Research
The objectives of this research were to evaluate the effects of hydroxamic acids, a group of corn root defense substances on western corn rootworm (Diabrotica virgifera virgifera LeConte) larvae and identify putative molecular mechanisms for hydroxamic acid detoxification. Corn line 428G carries a homozygous mutant bx1 gene, which makes it unable to synthesis hydroxamic acids. In contrast, H88 is the wild type parental line of 428G and is able to synthesize hydroxamic acids. Larvae were fed on 428G and H88 roots for 7 days for comparison. No significant difference was observed in growth, development, or survival rate. A RNA-Sequencing …
Characterization Of Resistance To The Cry1f Toxin From Bacillus Thuringiensis In Resistant Fall Armyworm, Spodoptera Frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) From Puerto Rico, Ana Maria Velez
Department of Entomology: Dissertations, Theses, and Student Research
Transgenic corn expressing Cry1F protein from Bacillus thuringiensis Berliner has been registered for Spodoptera frugiperda control since 2003. Unexpected damage to Cry1F corn was reported in 2006 in Puerto Rico and Cry1F resistance in S. frugiperda was documented. The inheritance of Cry1F resistance was characterized in a S. frugiperda resistant strain from Puerto Rico which displayed >387-fold resistance to Cry1F. Concentration-response bioassays of reciprocal crosses of resistant and susceptible parental populations indicated that resistance is recessive and autosomal. Bioassays of the backcross of the F1 generation crossed with the resistant parental strain suggest that a single locus is responsible …
Spillover Benefits Of Wildlife Management To Support Pheasant Populations, Aaron M. Anderson, Karen Gerhardt, Wylie T. Cross, Stephanie A. Shwiff
Spillover Benefits Of Wildlife Management To Support Pheasant Populations, Aaron M. Anderson, Karen Gerhardt, Wylie T. Cross, Stephanie A. Shwiff
USDA Wildlife Services: Staff Publications
Ring-necked pheasant (Phasianus colchicus) and other upland game populations in Wyoming, USA, have been declining due to changes in agricultural practices, urban development, and predation. Raccoons (Procyon lotor) have been implicated as one of the main predators of pheasant nests. Management of raccoons to support pheasant populations has the direct benefit of increasing pheasant populations and additional spillover benefits to corn producers in the region may occur. We conducted a field study in southeastern Wyoming from July to October 2009 to estimate the increase in corn yield associated with raccoon trapping. Although the primary purpose of the raccoon trapping was …