Control Test, 1986

The efficacy of 4 emulsifiable concentrate and 4 bait formulated insecticides was tested against bigheaded ants in 0.2-ha plots of second ratoon pineapple on Lanai Island, Hawaii. The emulsifiable concentrates were applied diluted in 300 gal water/acre by boom sprayer. The bait formulations were applied at 1.5 lb bait/acre with a hand-held whirlybird fertilizer applicator. Pretreatment ant density counts were made 6 Oct using 6 stakes baited with peanut butter and soybean oil (50:50 mixture) placed near the center of each. Treatments were applied 14 Oct. Ant counts (ants/stake) were indexed for each stake, and 0, 1, 2, 3, 4, and 5 were equal to 0, 1-25, 26-100, 101-300, 301-500, and >500 ants/stake, respectively.