Cucumber Lure Trapping of Zeugodacus cucurbitae (Diptera: Tephritidae) in Hawaii and Taiwan: Longevity and Nontargets Captures

Jang, Eric B.; Carvalho, Lori A.F.N.; Chien-Chung Chen; Siderhurst, Matthew S.; Chen, Chung-Chien

doi:10.1093/jee/tow268

Cucumber Lure Trapping of Zeugodacus cucurbitae (Diptera: Tephritidae) in Hawaii and Taiwan: Longevity and Nontargets Captures

Journal

Journal of Economic Entomology

Journal Volume

110

Journal Issue

1

Pages

201-207

Date Issued

2017-02

Date

2017-02

Author(s)

Jang, Eric B.

Carvalho, Lori A.F.N.

Chien-Chung Chen

Siderhurst, Matthew S.

DOI

10.1093/jee/tow268

URI

https://scholars.tari.gov.tw/handle/123456789/5255

https://academic.oup.com/jee/article/110/1/201/2733286

Abstract

The melon fly, Zeugodacus cucurbitae (Coquillett), is a serious pest of tropical horticulture, causing damage to cucurbits, tree fruits, and fruiting vegetables. Melon flies are especially attractive to freshly sliced cucumber, and this has led to the identification of a nine-compound kairomone lure that can be used to trap both female and male flies. In this study, a seven-compound lure, containing (Z)-6-nonenal, (Z)-6-nonen-1-ol, 1-octen-3-ol, (E,Z)-2,6nonadienal, (E)-2-nonenal, hexanal, and 1-hexanol, was formulated into PVC plugs (100 or 300mg/plug) for field testing in wet traps. In Hawaii, 100mg of the seven-compound cucumber lure, loaded in either plugs or glass capillaries, attracted more flies than traps containing Solulys protein over a 9-wk period. However, both cucumber lure formulations showed marked declines in the number of flies trapped after 3 wk. Similar results were obtained during a 6-wk field trial using 100mg cucumber lure plugs in Taiwan. Increasing the cucumber lure loading rate to 300mg/ lure increased the effective trapping life of the attractant during a second 9-wk field trial conducted in Hawaii. The synthetic cucumber lure showed female-biased sex ratios in trap captures in the Taiwanese and second Hawaiian field trials. Protein lures captures were female-biased in all three field trials. Wet traps in Hawaii containing the cucumber lure were found to capture 25-30 nontarget insects/trap/week, less than half that captured with Solulys. Captured nontarget insects represented 37 families in 10 orders. The most common families caught were Ceratopogonidae (similar to 9 flies/trap) and Gryllidae (similar to 7 crickets/trap).

Subjects

Melon fly

Zeugodacus cucurbitae

kairomone

attractant

Tephritidae

Publisher

Entomological Society of Americ

Type

journal article

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