Abstract
Abstract This study, to compare efficacy of insecticides applied at different plant stages for banded sunflower moth (BSM) larvae control, was located at the West Central Experiment Station, Morris, Minn. Plots were 4 30-inch rows × 30 ft planted 7 May, replicated 3 times, and arranged in a randomized complete block design. Insecticides were applied at 2 stages of sunflower growth. Applications were made using a hand-held CO2 sprayer at 40 psi. Insecticide was broadcast in 25 gal/acre total material. Heads were collected from 20 ft row, dried, and thoroughly smashed. An uncleaned sample was removed for the BSM count; the remainder were cleaned. Both were weighed and recorded. BSM counts were taken on 200 seeds/uncleaned subsample. BSM infestation levels were low. All treatments were equal and superior to the untreated check. There were no differences in yield in this trial.
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