Alfalfa Weevil and Pea Aphid Control on Alfalfa, 1996

Abstract

Abstract Test plots were established near Filer, Idaho. The soil type was Portneuf silt loam and the field was irrigated by surface flow. Four treatments and an untreated check were replicated four times in a RCB design. Each individual test plot was 25 X 25 ft. Sprays were applied using a CO2 pressurized backpack sprayer using 30 psi and delivering 20 gpa with four, 10X hollow cone nozzles. Sampling was accomplished by taking five, 90° pendulum sweeps (15-inch diam sweep net) per plot. Counts were made of all alfalfa pest species present as well as all beneficial insects. A pre-treatment count was made and all treatments were applied on 17 Jun. Additional counts were made at 48 h, 7 and 9 DAT. Data were analyzed using ANOVA and Neuman-Keuls multiple means comparison (P = 0.05).