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Full-Text Articles in Agriculture
Cardenolide, Potassium, And Pyrethroid Insecticide Combinations Reduce Growth And Survival Of Monarch Butterfly Caterpillars (Lepidoptera: Nymphalidae), Annie J. Krueger, Emily A. Robinson, Thomas J. Weissling, Ana M. Vélez, Troy D. Anderson
Cardenolide, Potassium, And Pyrethroid Insecticide Combinations Reduce Growth And Survival Of Monarch Butterfly Caterpillars (Lepidoptera: Nymphalidae), Annie J. Krueger, Emily A. Robinson, Thomas J. Weissling, Ana M. Vélez, Troy D. Anderson
Department of Entomology: Faculty Publications
The monarch butterfly, Danaus plexippus L., has evolved to be insensitive to milkweed cardenolides via genetic modifications of Na+/K+-ATPase. There is concern for insecticide exposures near agriculture, with little information on monarch caterpillar toxicology. It is unclear how cardenolide insensitivity may affect the sensitivity of monarch caterpillars to pyrethroid insecticides. Additionally, potassium fertilizers may affect monarch caterpillar physiology and cardenolide sequestration. Here, we investigated the growth, survival, and development of caterpillars exposed to the cardenolide ouabain, bifenthrin, and potassium chloride (KCl) alone and in combination. Caterpillars were either exposed to (1) ouabain from third- to fifth-instar …
Evidence Of Western Corn Rootworm (Diabrotica Virgifera Virgifera Leconte) Field-Evolved Resistance To Cry3bb1 + Cry34/35ab1 Maize In Nebraska, Jordan Reinders, Emily E. Reinders, Emily Robinson, Brian W. French, Lance J. Meinke
Evidence Of Western Corn Rootworm (Diabrotica Virgifera Virgifera Leconte) Field-Evolved Resistance To Cry3bb1 + Cry34/35ab1 Maize In Nebraska, Jordan Reinders, Emily E. Reinders, Emily Robinson, Brian W. French, Lance J. Meinke
Department of Entomology: Faculty Publications
BACKGROUND: Western corn rootworm (WCR; Diabrotica virgifera virgifera) field-evolved resistance to transgenic maize expressing the Cry3Bb1 protein derived from Bacillus thuringiensis (Bt) has been confirmed across the United States Corn Belt. Although use of pyramided hybrids expressing Cry3Bb1 + Cry34/35Ab1 has increased in recent years to mitigate existing WCR Bt resistance, susceptibility of Nebraska WCR populations to this rootworm–Bt pyramid has not been assessed. Plant-based bioassays were used to characterize the susceptibility of WCR populations to Cry3Bb1 and Cry3Bb1 + Cry34/35Ab1 maize. Populations were collected from areas of northeastern Nebraska with a history of planting Bt maize that expressed Cry3Bb1 …
Participatory On-Farm Research During Graduate School: Challenges And Opportunities, Fernanda Souza Krupek, Carlos Bonini Pires, Gabriela Inveninato Carmona
Participatory On-Farm Research During Graduate School: Challenges And Opportunities, Fernanda Souza Krupek, Carlos Bonini Pires, Gabriela Inveninato Carmona
Department of Entomology: Faculty Publications
Including farmers, growers, and ranchers (hereinafter referred to as producers) as active participants in the development of knowledge, through extension and on-farm research programs, is an effective method of agricultural technology and innovation transfer. The emerging interest in understanding agricultural systems’ complexity has fostered collaborations between producers and land grant universities, particularly across graduate programs focused on applied research. While the concept of on-farm research is not new, the scale and impact of on-farm studies conducted by researchers in partnership with producers are expanding (Kyveryga, 2019). Can master’s and Ph.D. research projects be conducted at the farm scale and generate …