Attractants for the Northern Corn Rootworm (Coleoptera: Chrysomelidae): Alkyl- and Alkenylphenols
| Autor: | T. L. Ladd, T. P. McGovern |
|---|---|
| Rok vydání: | 1990 |
| Předmět: | |
| Zdroj: | Journal of Economic Entomology. 83:1316-1320 |
| ISSN: | 1938-291X 0022-0493 |
| DOI: | 10.1093/jee/83.4.1316 |
| Popis: | Attractant studies with the northern corn rootworm, Diabrotica barberi Smith & Lawrence, showed it to be strongly attracted to four monosubstituted phenols. The structures of three of the attractive phenols differ from the structures of three highly effective attractants for D. barberi reported previously, eugenol (4-allyl-2-methoxyphenol), isoeugenol (2-methoxy-4-[1-propenyl[phenol), and 2-methoxy-4-propylphenol, in that they do not have a methoxy substituent. The 2-methoxy group, therefore, does not appear to be an essential structural feature necessary for high levels of D. barheri attraction. 4-(1-Propenyl) phenol was the most effective monosubstituted phenol in the study, with no significant difference in attractiveness, either early or late in the season, between it and eugenol. 2-(1-Propenyl) phenol was the only phenol substituted other than at the 4-position to show a high level of attractiveness. As the trapping season progressed, the response of D. barberi toward 2-(1-propenyl) phenol increased substantially. It was significantly less attractive than eugenol early in the season, but near the end of the season its mean catch was not significantly different from that of eugenol. The E isomer of 2-(1-propenyl) phenol was highly attractive to D. barberi ; the Z isomer was only slightly attractive. Thus, the 1-propenyl group, in conjunction with the hydroxyl group, appears to be especially effective in activating the attractive response of D. barberi . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|