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1 August 2006 Behavioral Responses of Rhagoletis cingulata (Diptera: Tephritidae) to GF-120 Insecticidal Bait Enhanced with Ammonium Acetate
K. S. Pelz-Stelinski, L. J. Gut, R. Isaacs
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Abstract

GF-120 is a baited formulation of the insecticide spinosad containing 1% ammonium acetate, developed for control of economically important fruit flies. The response of feral cherry fruit flies, Rhagoletis cingulata Loew, to GF-120 augmented with 0, 5, or 10% ammonium acetate was evaluated under orchard conditions. Significantly more flies were observed within 30 cm of bait droplets with 10% ammonium acetate added compared with standard bait or to a water control. These fly visits to GF-120 enhanced with 10 or 5% ammonium acetate lasted an average of 263.2 ± 85.2 and 337.6 ± 72.6 s, respectively, compared with 50.3 ± 36.4 s for standard GF-120. Droplets containing additional ammonium acetate also were contacted by more flies, and more flies fed upon these droplets than on GF-120 or the water control. Furthermore, the duration of feeding on GF-120 bait enhanced with either level of additional ammonium acetate was significantly greater compared with standard GF-120 or water. Feeding events lasted between 61.5 ± 30.7 and 73.4 ± 21.0 s on enhanced GF-120 compared with 6.8 ± 5.7 s on standard GF-120. Collectively, these results indicate that the interaction of feral R. cingulata with GF-120 droplets and the toxicant spinosad can be increased by addition of ammonium acetate.

K. S. Pelz-Stelinski, L. J. Gut, and R. Isaacs "Behavioral Responses of Rhagoletis cingulata (Diptera: Tephritidae) to GF-120 Insecticidal Bait Enhanced with Ammonium Acetate," Journal of Economic Entomology 99(4), 1316-1320, (1 August 2006). https://doi.org/10.1603/0022-0493-99.4.1316
Received: 7 October 2005; Accepted: 1 April 2006; Published: 1 August 2006
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