Olfactory and feeding preferences of Cryptorhynchus lapathi L. (Coleoptera : Curculionidae) among hybrid clones and natural poplars
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| Authors: | Broberg, CL; Borden, JH; Gries, R |
| Year: | 2005 |
| Journal: | Environ Entomol 34: 1606-1613 |
| Title: | Olfactory and feeding preferences of Cryptorhynchus lapathi L. (Coleoptera : Curculionidae) among hybrid clones and natural poplars |
| Abstract: | Hybrid poplar clones show varying levels of attack by Cryptorhynchus lapathi (L.), a wood-boring weevil. We studied differences in olfactory and feeding behavior among four different hybrid poplars in a series of laboratory bioassays. Weevils did not discriminate between resistant and susceptible clones base(] on olfaction in pitfall bioassays or antennal responses but did discriminate against the most resistant hybrid, NM 6 (P. nigra L. X P. maximowiczii Henry), in choice and no-choice paired-twig feeding bioassays. In addition, the susceptible hybrid, TN 302-9 (P. trichocarpa Torrey and Gray X P. nigra), was preferred for feeding over Salix scouleriana Barratt ex Hooker, a preferred host in the wild. We conclude that resistance among hybrid poplars is in part based on antixenotic cues before oviposition. |
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