Boll Weevil: 1 Capture in Pheromone Traps Baited with Natural Male Lure and Several Concentrations of Grandlure 23

Abstract

Traps baited with slow release formulations of grandlure (30–40 mg/trap) remained effective for 6 wk without rebaiting and captured more boll weevils, Anthonomus grandis grandis Boheman, than traps rebaited weekly with 3 or 6 mg of grandlure. A 2-fold increase in grandlure concentration produced a significant increase in weevil capture, but captures were not increased additionally by a 4-fold increase when the 2 concentrations were not competing for capture of the same weevils. There was little difference in the attraction of boll weevils to one wick containing 3 mg of grandlure or to one laboratory reared male boll weevil that had fed on cotton squares.