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Quantitative analysis of contents and volatile emissions from α-copaene and quercivorol lures, and longevity for attraction of Euwallacea nr. fornicatus in Florida.
- Source :
-
Journal of Pest Science . Jan2019, Vol. 92 Issue 1, p237-252. 16p. - Publication Year :
- 2019
-
Abstract
- Ambrosia beetles in the cryptic species complex Euwallacea nr. fornicatus vector a fungal pathogen responsible for Fusarium dieback, a disease that impacts avocado (Persea americana), woody ornamentals, and numerous native trees in the USA (California, Florida), 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 (-)-α-copaene as a new attractant. In this study, lure longevity and efficacy were assessed in three 12-week field tests conducted in Florida by deploying traps baited with quercivorol, α-copaene, and a combination of the two. A fourth test compared different formulations of quercivorol. Concurrent with field experiments, gas chromatographic analyses were conducted to quantify initial lure contents as well as volatile emissions from lures field-aged for 12 weeks. 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 weeks; longevity of single lures varied from 9 to 12 weeks. Twelve terpenoids were detected from the α-copaene-enriched oil, suggesting there may be additional attractants. Analysis of the quercivorol lure showed it contained 88% trans- and 9% cis-p-menth-2-en-1-ol. Results indicate that the combination of quercivorol and α-copaene provides a long-lasting, effective lure for early detection of E. nr. fornicatus 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 (-)-α-copaene. [ABSTRACT FROM AUTHOR]
- Subjects :
- *AMBROSIA beetles
*FUSARIUM
*AVOCADO
*ENANTIOMERS
*KAIROMONES
Subjects
Details
- Language :
- English
- ISSN :
- 16124758
- Volume :
- 92
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Pest Science
- Publication Type :
- Academic Journal
- Accession number :
- 134561584
- Full Text :
- https://doi.org/10.1007/s10340-018-0960-6