Submitted to: Journal of Applied Entomology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/18/2017
Publication Date: 3/16/2017
Citation: Knight, A.L., Judd, G., Basalto, E. 2017. Development of 2-phenlethanol and acetic acid lures to monitor Obliquebanded leafroller (Lepidoptera: Tortricidae) under mating disruption. Journal of Applied Entomology. doi:10.1111/jen.12393. Interpretive Summary: Effective, low-cost monitoring of tree fruit pests is an important component of developing integrated programs which can minimize the use of insecticides. Researchers at the USDA, ARS, Yakima Agricultural Research Laboratory, Wapato,WA in collaboration with researchers in Chile and Canada developed a new lure for obliquebanded leafroller and compared it with a sex pheromone lure in orchards treated with sex pheromone. It was determined that the new lure was more effective than the sex pheromone lure and caught both sexes. Information from this research supports the continued effort to develop even more effective lures that can be used in trap-based monitoring program for important moth pests in tree fruits.
Technical Abstract: Studies were conducted to compare the relative attraction of the benzenoid plant volatiles 2-phenylethanol, phenylacetaldehyde, and phenylacetonitrile in combination with acetic acid as lures for male and female adults of the obliquebanded leafroller, Choristoneura rosaceana (Harris), in apple, Malus domestica Bordhausen. Traps baited with 2-phenylethanol plus acetic acid caught significantly more total and female moths than did binary combinations of acetic acid with the other two benzenoid volatiles. No binary or ternary combinations of the three aromatic volatiles combined with acetic acid outperformed 2-phenylethanol plus acetic acid. Similar results were found with Pandemis pyrusana Kearfott. Total moth catches of C. rosaceana with acetic acid plus 2-phenylethanol, but not with phenylacetonitrile, were not significantly different than male catches with sex pheromone-baited traps in conventional orchards. Traps baited with acetic acid plus either 2-phenylethanol, or phenylacetonitrile caught significantly more total moths than did sex pheromone-baited traps in orchards treated with leafroller sex pheromone dispensers. The evaporation rates of acetic acid and 2-phenylethanol from lures were important factors affecting moth catches. Adding 2-phenylethanol to traps baited with pear ester, acetic acid and the sex pheromone of codling moth, Cydia pomonella (L.), did not reduce total moth catches of this species. Traps baited with 2-phenylethanol plus acetic acid consistently caught the green lacewing, Chrysoperla spp., and in numbers significantly greater than traps baited with acetic acid alone, or in combination with phenylacetaldehyde or phenylacetonitrile.