Control of Foliage Feeding Lepidoptera in Peanuts, 1980

Peanuts were planted on May 20 with 0.9 m row spacing in light, sandy soil. Insecticides were applied on Aug 23 utilizing 2 flat spray nozzles over each row and a total volume of 70 g/acre. Treatments were replicated 4 times on 6 row x 15 m plots arranged in a randomized complete block design. Insect populations were sampled in the middle 4 rows of each plot. On each date 5 samples/ plot, each consisting of 0.6 m of row, were checked for H. zea and S. exiqua. Plants were beaten to removed larvae for counting. Twenty-five terminals/plot were collected at random and examined for S. bosqueella. Counts for this species were converted to larvae/m of row based on terminal counts made over the experimental area. Generations of all species had commenced a few days before insecticides were applied. Larval populations increased due to continued oviposifion after treatments were applied.