Abstract

MOYA-MURILLO, OSCAR MAURICIO; ALDANA-DE LA TORRE, ROSA CECILIA  and  BUSTILLO-PARDEY, ALEX ENRIQUE. Efficacy of traps to capture Rhynchophorus palmarum (Coleoptera: Dryophthoridae) in oil palm plantations. Rev. Colomb. Entomol. [online]. 2015, vol.41, n.1, pp.18-23. ISSN 0120-0488.

Rhynchophorus palmarum is a very important pest of oil palm, due to its association with the red ring and bud rot diseases. The use of traps to capture adults seeks to reduce their populations, the incidence of red ring and the colonization of wounded palms or infected by bud rot. To test the efficacy capturing R. palmarum using different trap types, with the aggregation pheromone Rhynchophorol and a kairomone composed of a fermented bait of water-molasses and sugar cane, two experiments were conducted in plantations of Tumaco, Nariño, Colombia. In a first experiment, five type of traps were tested all of them baited with Rhynchophorol and the kairomone using 1,500 ml of fermented water - molasses in a ratio 2:1, and 500 g of sugar cane. Results indicated that traps with canvas, pheromone and kairomone were statistically (P = 0.05) more effective in capturing R. palmarum (471 adults/trap/biweekly), than other traps tested. The second experiment was conducted using the best trap from the previous experiment, and testing five proportions of kairomone, varying from 200 to 1,500 cc of bait and 200 to 500 g of sugar cane. Results showed that higher proportions of kairomone were statistically (P = 0.05) more effective (614 individuals/trap/week), compared with the other proportions evaluated, which did not exceed 460 individuals/trap/week. The canvas-trap with pheromone, 1,000 cc of bait and 300 g of sugar cane was selected, because of its efficacy capturing R. palmarum adults at an annual cost of US $ 85/trap.

Keywords : Rhynchophorol; Red ring; Bud rot.

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