Submitted to: Journal of British Columbia Entomological Society
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/20/2004
Publication Date: 12/20/2004
Citation: Knight, A.L., Light, D.M. 2004. Use of (E,Z)-2,4-decadienoic acid in codling moth management: Kairomone species specificity. Journal of British Columbia Entomological Society. 101:61-67. Interpretive Summary: Codling moth is the key pest of apple and pear, and new methods are needed for monitoring and controlling it in the Pacific Northwest. Researchers at the USDA-ARS Yakima Agricultural Research Laboratory are studying a new chemical attractant, the pear ester, for use in trapping codling moth. The pear ester is a volatile characteristic of ripe pear. It has been used as an effective monitoring tool for both male and female codling moth in walnut, apple, and pear crops. Studies reported here investigated whether this compound was attractive to other important pests of these and other horticultural crops. The pear ester was found not to be attractive to any of the eight pest species evaluated in crops as diverse as apple, pear, cherry, peach/nectarine, apricot, plum, almond, pistachio, grape, kiwi, and citrus.
Technical Abstract: Ethyl (2E, 4Z)-2,4-decadienoate (pear ester), is a potent attractant for both male and female codling moth, Cydia pomonella (L.), in apple, pear and walnut. Studies were conducted to evaluate the attractiveness of this kairomone for eight other lepidopteran pests of these three crops, as well as, in cherry, peach/nectarine, apricot, plum, almond, pistachio, grape, kiwi, and citrus. The pear ester was loaded (10.0 mg) into gray halobutyl septa and insects were monitored with triangle- or delta-shaped sticky traps. Lures were not attractive to the peach twig borer, Anarsia lineatella (Zeller); oriental fruit moth, Cydia molesta (Busck); omnivorous leafroller, Platynota stultana Walshingham; navel orangeworm, Amyelois transitella (Walker) apple fruitworm, Laconobia subjuncta (Grote & Robinson); pandemis leafroller, Pandemis pyrusana (Kearfott); obliquebanded leafroller, Choristoneura rosaceana (Harris); and western tentiform leafminer, Phyllonorycter mespiella (Huebner). Additional studies with C. molesta populations attacking apple and pear would be interesting.