A Modified Cone Emergence Trap with Increased Capabilities for Pecan Weevils

Robert P. West, Merle Shepard


A cone emergence trap for the pecan weevil, Curculio caryae (Horn), was constructed of hardware cloth with a Leggett trap top attached to the apex of the cone. This modification enabled the trap to sample pecan weevils emerging beneath it as well as those which crawl up the outside of the cone. With use of pheromones, the trap's efficiency could be further increased. The trap was as efficient as the presently used cone traps and collected over 9 times as many weevils during peak emergence than did cone emergence traps without the Leggett top modification. This modified trap also detected weevil emergence later in the season.

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