Location: Subtropical Horticulture ResearchTitle: a-Copaene and quercivorol lures: Chemical analysis and efficacy for detection of Euwallacea nr. fornicatus (Coleoptera: Curculionidae: Scolytinae) Author
|Owens, Daivd - Orise Fellow|
|Carrillo, Daniel - University Of Florida|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/9/2018
Publication Date: 4/16/2018
Citation: Kendra, P.E., Owens, D., Tabanca, N., Montgomery, W.S., Narvaez, T.I., Schnell, E.Q., Carrillo, D. 2018. a-Copaene and quercivorol lures: Chemical analysis and efficacy for detection of Euwallacea nr. fornicatus (Coleoptera: Curculionidae: Scolytinae). Meeting Abstract. 1st Virtual Symposium of the International Branch of the Entomological Society of America.
Technical Abstract: Invasive ambrosia beetles in the Euwallacea nr. fornicatus complex vector a fungal pathogen responsible for Fusarium dieback, a disease that impacts avocado (Persea americana) and numerous native trees in the USA, Israel, and other countries. Currently, these pests are detected with quercivorol lures (containing p-menth-2-en-1-ol isomers), but recent research identified an essential oil enriched in (-)-a-copaene as a new attractant. In this study, we evaluated lure longevity and efficacy in three 12-wk field tests conducted in Florida avocado groves using traps baited with quercivorol, a-copaene, and a combination of the two lures. A fourth test compared different formulations of quercivorol. In addition, gas chromatographic analyses were conducted to quantify initial lure contents as well as volatile emissions from lures field-aged for 12 wks. In all tests, the lure combination captured significantly more E. nr. fornicatus than the individual lures; and in two trials, synergistic attraction was observed. Field life of the combination lure was 12 wk; longevity of single lures varied from 9-12 wk. Twelve terpenoids were detected from the a-copaene-enriched oil, suggesting there may be additional attractants. Analysis of the quercivorol lure showed it contained 4 isomers, with 88% trans- and 9% cis- p-menth-2-en-1-ol. Results indicate that the combination of a-copaene and p-menth-2-en-1-ol provides a long lasting, effective lure for early pest detection in Florida. Further research is needed to determine which isomer of p-menth-2-en-1-ol is attractive to Florida E. nr. fornicatus, and if other members of the species complex are attracted to (-)-a-copaene.