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1 October 2004 Effects of Aging and Dilution on Attraction and Toxicity of GF-120 Fruit Fly Bait Spray for Melon Fly Control in Hawaii
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Abstract

Attractiveness and toxicity of GF-120 Fruit Fly Bait (Dow AgroScience Indianapolis, IN) to melon flies, Bactrocera cucurbitae Coquillett, were examined to assess the effects of concentration and aging. We tested dilutions of 20, 40, and 80 ppm (AI) (spinosad) against water controls. The 80 and 40 ppm treatments were significantly more attractive than the 20 ppm and control treatments. Attraction was compared between baits aged for 2 and 24 h, fresh bait and water controls. Age had significant effects on both attractiveness and toxicity of GF-120. Baits aged for 2 h were 11 times less attractive to female melon flies than fresh bait. Mortality rates were reduced by 50% when GF-120 was subjected to rain. Our results suggest the need for frequent applications of Gf-120 to obtain maximum benefits, particularly in wet tropical climates.

Hannah C. Revis, Neil W. Miller, and Roger I. Vargas "Effects of Aging and Dilution on Attraction and Toxicity of GF-120 Fruit Fly Bait Spray for Melon Fly Control in Hawaii," Journal of Economic Entomology 97(5), 1659-1665, (1 October 2004). https://doi.org/10.1603/0022-0493-97.5.1659
Received: 22 December 2003; Accepted: 1 June 2004; Published: 1 October 2004
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