SUPPLEMENTAL FOOD PREFERENCE for the WEAVER ANT, a POTENTIAL BIOLOGICAL CONTROL AGENT of the MAHOGANY SHOOT BORER Grace T

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SUPPLEMENTAL FOOD PREFERENCE FOR THE WEAVER ANT, A POTENTIAL BIOLOGICAL CONTROL AGENT OF THE MAHOGANY SHOOT BORER Grace T. Lim1&2, Scott M. Salom1, Loke T. Kok1, and Laurence G. Kirton2 1Department of Entomology, Virginia Tech, 216A Price Hall MC0319, Blacksburg, VA 24061 2Forest Research Institute Malaysia, Entomology Section, Kepong, Selangor, 52109, Malaysia ABST R ACT Supplemental feeding is being investigated as a was similarly conducted, but provided only one of the four method to enhance the performance of the weaver ant food types to a total of 12 colonies. The choice test showed (Oecophylla smaragdina Fabricius) (Hymenoptera: that at least one of the treatment effects was significantly Formicidae), a promising biological control agent greater than zero (S = 13.2; d.f. = 3; p = 0.0001; of the mahogany shoot borer (Hypsipyla robusta) Friedman’s test). Mealworms were significantly preferred (Lepidoptera: Pyralidae) in Malaysia. The nests over the other foods, and consumption of weaver ant of this aggressive, predatory tree-dwelling ant can formula was significantly greater than that of fish or honey be harvested from various host plant species and (p ≥ 0.05; Conover-Inman’s test). The no-choice test redistributed to mahogany plantations that need its showed a significant difference between at least one of the protection. Choice and no-choice tests assessed the treatments (H = 8.95; d.f. = 3; p = 0.03; Kruskal-Wallis preference of ant colonies for four foods. In the choice test). Consumption of mealworms and fish was significantly test, six ant colonies were each provided ad libitum greater than that of the liquid foods (Conover-Inman’s test). access to four food choices on a feeding platform: Thus, mealworms were most palatable to the ants, but fish fresh minced fish, live mealworms, a liquid “weaver was readily accepted when no other foods were available. ant formula” containing sucrose and human muscle- Mealworms and weaver ant formula were selected for a training powder, and honey solution. The 7-day study subsequent study evaluating the effect of supplemental recorded food weight taken daily. The no-choice test feeding on the establishment of relocated ant colonies. 52 2007 USDA Interagency Research Forum - GTR-NRS-P-28.

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