Alfalfa Weevil and Pea Aphid Control on Alfalfa in Far West Texas, 1982

Approximately 0.9 ha of an alfalfa field in the El Paso Lower Valley was divided into 40 plots, 12.2 m by 18.3 m each, in a randomized complete block design with 4 replications. Nine treatments were applied Apr 1 using CO2powered (2.1 kg/cm2) backpack sprayers, each with a boom with 3 TX6 nozzles spaced 50.8 cm apart. Rate of application was 112.2 1/ha of total solution. In each sample period, 20 sweeps per plot were collected and the insects were placed in ziplock bags for sorting, identification, and counting. Data were transformed (X1 + 0.5) and subjected to analysis of variance and Duncan’s New Multiple Range Test.