Abstract
Fire ants directly damage plants by chewing twigs and tender bark of young trees and protect honeydew producing pests from their natural enemies. Three insecticide baits were applied to the ground of a planting of four-year-old ‘Powell’ navel trees in Plainview, CA with a Herd broadcast spreader mounted on a 4-wheel ATV on 12 Jun 2013. Treatments were assigned in a RBD and plots were 12 rows by 25 trees with 18 x 12 spacing between trees. Treatments were assigned according to pre-treatment ant densities determined on 6 Jun. The ant population was monitored by placing one Frito corn chip in the center of a Tomcat glue board staked to the ground next to the outside canopy of the tree. Six traps were evenly spaced in the center 2 rows of each plot. The traps remained in the field for 72 hours and then were collected and the ants counted. The ant population was monitored bi-weekly 12 Jun until 7 Oct. The mean number of ants per trap was compared between treatments using ANOVA after log(x+1) transformation of the data and the means were separated according to LSD (P = 0.05)
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