A Safe and Effective Propylene Glycol Based Capture Liquid for Fruit Fly (Diptera: Tephritidae) Traps Baited with Synthetic Lures

Donald B. Thomas


Antifreeze is often used as the capture liquid in insect traps for its preservative and evaporative attributes. In tests reported herein, fruit fly traps using non-toxic recreational vehicle (RV) propylene glycol based antifreeze captured significantly more Anastrepha ludens (Loew) than did traps with the automotive antifreeze. Automotive antifreeze has a characteristic odor due to the additive tolytriazole. The odor may have been mildly repellent. Whether better or equal in efficacy, fruit fly trapping programs should consider using the non-toxic formulation as an environmentally friendly alternative over the automotive antifreeze, which contains a number of hazardous compounds.

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