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Baculovirus heliothis effect of selective placement on heliothis mortality and efficacy in directed sprays on cotton



Baculovirus heliothis effect of selective placement on heliothis mortality and efficacy in directed sprays on cotton



Journal of the Georgia Entomological Society 12(2): 167-172



Cotton plants were selectively treated with B. heliothis in the greenhouse and field. Mortality of released 1st, 2nd, or 3rd stage Heliothis zea (Boddie) larvae was greatest when they were collected from plants on which fruiting structures or lower leaf surfaces were virus-treated. When cotton plant parts at different heights on the plants were virus-treated, mortality was greatest from treated fruiting structures or lower surfaces of leaves within the upper 2/3 of cotton plants. In a small plot field test on directed sprays, nozzle arrangement and orientation appeared not to influence virus efficacy.

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