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Full-Text Articles in Life Sciences
Colonization Of Immature Black Flies (Diptera: Simuliidae) On Artificial Substrates In A Nebraska Sandy River, K. P. Pruess
Colonization Of Immature Black Flies (Diptera: Simuliidae) On Artificial Substrates In A Nebraska Sandy River, K. P. Pruess
Department of Entomology: Faculty Publications
Colonization of Simulium bivittatum Malloch and S. luggeri Nicholson and Mickel on artificial substrates exposed for two consecutive time periods of 1, 2, or 4 d was contrasted with colonization after continuous exposures of 2, 4, or 8 d. Reduced colonization of early instars of both species during the second 4-d period was attributed to an aging population, whereas reductions in total black flies after 8 d seemed to be caused by substrate changes. Numbers of pupae increased as exposure time increased.
Effect Of Host Plant On The Level Of Virulence Of Nilaparvata Lugens (Homoptera: Delphacidae) On Rice Cultivars, A. H. Bahagiawati, E. A. Heinrichs, F. G. Medrano
Effect Of Host Plant On The Level Of Virulence Of Nilaparvata Lugens (Homoptera: Delphacidae) On Rice Cultivars, A. H. Bahagiawati, E. A. Heinrichs, F. G. Medrano
Department of Entomology: Faculty Publications
The virulence of a planthopper, Nilaparvata lugens (Stål) biotype 3, reared on rice cultivar ASD7and of N. lugens colonies collected on Mindanao Island in the southern Philippines and reared on the widely grown commercial cultivars IR36 and IR42 was compared. Based on plant damage, insect weight, population growth, and feeding activity, the Mindanao N. lugens colonies reared on IR36 and IR42 were more virulent than biotype 3, although ASD7, IR36, and IR42 have the bph2 gene for N. lugens resistance. These results clearly indicate that in the screening of breeding lines for resistance to N. lugens, it is …
Pheromone Delivery System: Western Corn Rootworm (Coleoptera: Chrysomelidae) Pheromone Encapsulation In A Starch Borate Matrix, Lance J. Meinke, Z. B. Mayo, Thomas J. Weissling
Pheromone Delivery System: Western Corn Rootworm (Coleoptera: Chrysomelidae) Pheromone Encapsulation In A Starch Borate Matrix, Lance J. Meinke, Z. B. Mayo, Thomas J. Weissling
Department of Entomology: Faculty Publications
Western corn rootworm, Diabrotica virgifera virgifera LeConte, sex pheromone, racemic 8-methyl-2-decyl-propanoate (MDP) was successfully encapsulated in a starch borate (5B) matrix creating a controlled release granular formulation. The release rate of MDP from starch borate granules was attractive to male D. virgifera at high and low D. virgifera population levels in field corn. Male D. virgifera were attracted to the 5B-MDP granules throughout the growing season, but efficacy declined during the period of peak female D. virgifera emergence and corn pollination. The 5B-MDP delivery system was as effective as a septa-MDP delivery system, and 5B-MDP formulations had a shelf life …