EFFICACY OF SELECTED INSECTICIDES ON CABBAGE LOOPER AND DIAMONDBACK MOTH ON CABBAGE 2005

Abstract

The test was conducted at the Texas A&M University Agricultural Research and Extension Center at Weslaco, TX. The objective of this trial was to test the efficacy of some newer insecticides for controlling cabbage looper and diamondback moth on cabbage under field conditions in south Texas in the spring, 2004. The materials were applied using a tractor-mounted sprayer with 3 ceramic hollow cone nozzles per row (TX-10, one over the plants, two on drops) at 100 psi at a delivery rate of 30 gpa. Numbers of small and large larvae of cabbage looper and diamondback moth were counted by checking both the upper and lower surfaces of every leaf on each plant, and 10 plants per plot. At termination, a damage/quality evaluation was made on ten plants per plot based on the following six categories: 0-no damage, 1-minor feeding damage (1% eaten), 2-minor-moderate feeding damage (2-5% eaten), 3-moderate damage (6-10% eaten), 4-moderate-heavy damage (11-30% eaten), and 5-heavy damage (>30% eaten). Numbers of larvae per plant from each plot and the damage rankings were subjected to ANOVA, and the means were separated using LSD (P ≤ 0.05).