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Corn Phenology Influences Diabrotica Virgifera Virgifera Emigration And Visitation To Soybean In, Matthew E. O'Neal, D. A. Landis, J. R. Miller
Corn Phenology Influences Diabrotica Virgifera Virgifera Emigration And Visitation To Soybean In, Matthew E. O'Neal, D. A. Landis, J. R. Miller
Matthew E. O'Neal
We used two types of laboratory apparatus to test whether rotation-resistant and wild-type Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae) responded differently to corn phenology. Beetles from Nebraska where injury to rotated corn has not been reported were defined as wild type, and beetles from Illinois where injury to rotated corn is common represented “rotation-resistant“ populations. A two-chamber emigration arena assayed propensity of both populations to leave corn during and after anthesis. A side-arm olfactometer tested whether the relative attraction of beetles to soybean versus corn was influenced by corn phenology. Beetle origin did not influence departure from corn of varying …
Natural Distribution Of Hymenopteran Parasitoids Of Spodoptera Frugiperda (Lepidoptera: Noctuidae) Larvae In Mexico, Jaime Molina-Ochoa, James E. Carpenter, Roberto Lezama-Gutiérrez, John E. Foster, Martín González-Ramírez, César Andres Angel-Sahagún, Javier Farías-Larios
Natural Distribution Of Hymenopteran Parasitoids Of Spodoptera Frugiperda (Lepidoptera: Noctuidae) Larvae In Mexico, Jaime Molina-Ochoa, James E. Carpenter, Roberto Lezama-Gutiérrez, John E. Foster, Martín González-Ramírez, César Andres Angel-Sahagún, Javier Farías-Larios
Department of Entomology: Faculty Publications
Se llevó a cabo un inventario de parasitoides de larvas del gusano cogollero, Spodoptera frugiperda (J. E. Smith) (FAW) colectadas principalmente de maizales en estado de verticilio en seis estados mexicanos durante Agosto y Septiembre de 2000. Trece géneros de parasitoides himenópteros fueron recuperados, representando a tres familias, Braconidae: Aleoides, Chelonus, Cotesia, Glyptapanteles, Homolobus, y Meteorus); Ichneumonidae: Campoletis, Eiphosoma, Ophion, y Pristomerus; y Eulophidae: Aprostocetus, Euplectrus, y Horismenus. De un total de 5591 larvas colectadas, 772 produjeron parasitoides, para una tasa de parasitismo de 13.8%. La tasa de parasitismo más alta para una colecta simple fué …