A new fire ant (Hymenoptera: Formicidae) bait base carrier for moist conditions
2010
Kafle, Lekhnath | Wu, Wen-Jer | Shih, Cheng-Jen
BACKGROUND: A new water-resistant fire ant bait (T-bait; cypermethrin 0.128%) consisting of dried distillers grains with solubles (DDGS) as a carrier was developed and evaluated against a standard commercial bait (Advion®; indoxacarb 0.045%) under both laboratory and field conditions.RESULTS: When applying the normal T-bait or Advion® in the laboratory, 100% of Solenopsis invicta Buren worker ants were killed within 4 days. However, when the T-bait and Advion® were wetted, 70.6 and 39.7% of the ants were killed respectively. Under field conditions, dry T-bait and dry Advion® had almost the same efficacy against ant colonies. However, when T-bait and Advion® came in contact with water, the former's ability to kill S. invicta colonies in the field was only marginally reduced, while Advion® lost virtually all of its activity. In addition, DDGS was also shown to be compatible with a number of other insecticides, such as d-allethrin, permethrin and pyrethrin.CONCLUSION: Based on its properties of remaining attractive to the fire ants when wetted, combined with its ant-killing abilities both in the laboratory and in the field, T-bait is an efficient fire ant bait, especially under moist conditions.
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