Abstract
A highly species-specific nuclear polyhedrosis virus isolated from velvetbean caterpillar larvae (VBC), Anticarsia gemmatalis, has been used widely as a biological control for VBC in Brazilian soybean. A single virus application of a similar Brazilian isolate significantly suppressed VBC populations for the remainder of the growing season in field trials in Florida. However, the virus had to be applied when larval populations were one half normal economic threshold densities to prevent yield loss under severe pressure. Studies were expanded to compare efficacy of the above-mentioned viruses with a less species-specific nuclear polyhedrosis virus isolated from Autographa californica larvae. All three viruses at two treatment rates provided significant suppression of the damaging middle and late instar VBC larvae. The impacts on nontarget pests and predators of each virus and a standard chemical insecticide treatment also were determined in this study. The chemical insecticide treatment did not affect populations of nontarget pests or predators, and tolerance of sub-economic VBC densities in the virus treatments did not enhance populations of predators. Consequently, there was little ecological advantage in our research for using baculoviruses for VBC control compared with the standard chemical insecticide. Baculoviruses may have greater commercial potential in the USA as biopesticides against other pests more difficult to control with chemical insecticides.
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Funderburk, J., Maruniak, J., Boucias, D., Garcia-Canedo, A. (1992). Efficacy of Baculoviruses and their Impact on Pest Management Programs. In: Copping, L.G., Green, M.B., Rees, R.T. (eds) Pest Management in Soybean. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2870-4_8
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DOI: https://doi.org/10.1007/978-94-011-2870-4_8
Publisher Name: Springer, Dordrecht
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