Submitted to: Journal of Applied Entomology
Publication Type: Peer reviewed journal
Publication Acceptance Date: 4/7/2010
Publication Date: 6/21/2010
Publication URL: http://hdl.handle.net/10113/49425
Citation: Knight, A.L., Pickel, C., Hawkins, L., Abbott, C., Hansen, R., Hull, L. 2010. Monitoring Oriental Fruit Moth (Lepidoptera: Tortricidae) and Peach Twig Borer (Lepidoptera: Gelechiidae) with Clear Delta-shaped Traps. Journal of Applied Entomology 135:106-114. Interpretive Summary: Oriental fruit moth and peach twig borer are two key pests of stone fruits including peach, prune, and almonds. Effective monitoring of both pests is a prerequisite for growers to use insecticides judiciously. Researchers at the USDA, ARS Yakima Agricultural Laboratory, Wapato,WA, in collaboration with scientists at Univeresity of California in Davis and Penn State University are studying the use of new traps and lures to monitor these pests. Results showed that a clear-delta-shaped trap was more effective than a standard colored trap for both species when baited with a food bait lure. The use of a food bait lure in these traps was more effective than a sex pheromone lure in orchards treated with mating disruption. These results suggest that further improvements in monitoring these pests can be achieved.
Technical Abstract: Field studies evaluated the relative performance of a clear versus several colored delta traps baited with sex pheromone or a food bait for two key moth pests of stone fruits: oriental fruit moth, Graphollita molesta (Busck); and peach twig borer, Anarsia lineatella Zeller. Preliminary studies found that the clear was more effective than a colored trap for G. molesta in a sex pheromone-treated peach orchard (MD); and for both species in an untreated (non-MD) peach orchard. Similarly, the clear outperformed the orange trap when both were baited with terpinyl acetate plus (Z)-3-hexen-1-yl acetate lures. Studies were expanded to include commercial orchards in WA, OR, CA, and PA. Trap comparisions with sex pheromone lures of G. molesta were more variable with clear outperforming colored traps in three of six trials in non-MD orchards. The clear outperformed the colored trap with sex pheromone lures for A. lineatella in all four non-MD orchards. Seasonal catches of G. molesta in sex pheromone-baited traps in MD orchards were =0.3 moths per trap in all but one study with no significant difference found between traps. Seasonal catches of A. lineatella in MD orchards were generally low with both traps and significantly higher in clear traps in only one study. Traps baited with terpinyl acetate outperformed sex pheromone lures for G. molesta in MD peach orchards; and clear outperformed colored traps. Clear traps baited with terpinyl acetate plus (Z)-3-hexen-1-yl acetate caught significantly more G. molesta than similarly-baited red traps in an almond orchard and more than both trap types baited with terpinyl acetate alone. Catches of A. lineatella in the MD almond orchard were low with both lures in either trap.