Aerial Field Tests of Five Insecticides on Western Spruce Budworm in Idaho and Montana, 1978-1980

摘要

Each of five insecticides was applied at two or three application rates by helicopter to 20-ha plots. Effectiveness of each application rate against western spruce budworm (Choristoneura occidentalis) was judged by comparing larval population reduction at 15 or 20 days after treatment against populations in untreated check plots. Performance of each insecticide was then compared with the levels of control normally obtained with two registered insecticides, carbaryl and acephate (90+pct) usually used for western spruce budworm control. Maximum population reduction from sulprofos (58 pct), phosmet (59 pct), and from the growth regulator AY SIR-8514 (58 pct), at all application rates tested.