Planting Time Treatments for Control of Onion Thrips in Cotton, 1992

Efficacy of planting time insecticide treatments was evaluated against OT injury in cotton planted in eastern VA. The cotton was planted 1 May with 36-inch row spacing. In-furrow (IF) treatments were applied into the seed furrow at planting, granules using a tractor-mounted Noble applicator, liquids using a CO2 pressurized tractor-mounted sprayer calibrated to deliver 5 gal/acre at 24 psi through 1 SS8001E nozzle mounted just above planter disks and turned parallel to the row to deliver spray fan into the seed furrow. Seed treatments were applied by gently rolling seeds in a plastic bag containing product until seeds were evenly coated. A randomized complete block design was used with 4 replicates; plots were 4 rows by 40 ft. Treatments were evaluated by determining plant injury based on a 0-10 scale where 0 = no CT injured leaves and 10 = 100 percent leaves injured. Data were analyzed using ANOVA and LSD procedures.