Abstract
Abstract A small plot test was conducted at the Texas A&M Research and Extension Center in Weslaco to evaluate selected insecticides for efficacy against aphids on cotton. Plots measured 1 row (40 inches) by 30 ft. Treatments were arranged in a RCB design with 4 replications. Insecticides were applied with a CO2 pressurized (40 psi) backpack sprayer in a total volume of 10 gpa. Nozzle arrangement consisted of three 10X nozzles per row (1 over-top, 2 on drops). Treatments were applied 13 May. Aphids were monitored by random selection of 5 plants per plot and counting all apterous aphids on the first fully expanded leaf below the terminal.
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