Benzaldehyde: an alfalfa-related compound for the spring attraction of the pest weevil Sitona humeralis (Coleoptera: Curculionidae)

Zsófia Lohonyai, József Vuts, Zsolt Kárpáti, Sándor Koczor, Michael J. Domingue, József Fail, Michael A. Birkett, Miklós Tóth, Zoltán Imrei

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

BACKGROUND: Sitona weevils (Coleoptera: Curculionidae) are a species complex comprising pests of many leguminous crops worldwide, causing damage to young plants as adults and to rootlets as larvae, resulting in significant yield losses. Timely detection of migrating adult weevils is needed to determine when deployment of control measures becomes necessary. With the aim of developing plant volatile-based lures for Sitona spp. detection, we investigated the responses of S. humeralis to host plant-related aromatic compounds. RESULTS: In olfactometer studies, both male and female S. humeralis responded positively to the odour of alfalfa flowers, a source of aromatic volatiles. In single sensillum recordings, basiconic sensilla located on the third and fourth terminal segments of the antennal club of both sexes were found to respond to benzaldehyde at doses of 10−5 and 10−4 g, suggesting that the weevil is able to detect this compound at the peripheral sensory level. In field studies, S. humeralis was attracted to benzaldehyde in the spring, but not in the autumn. CONCLUSION: Benzaldehyde, as described in this study, may be a suitable candidate for the development of monitoring tools for S. humeralis.

Original languageEnglish
Pages (from-to)3153-3159
Number of pages7
JournalPest Management Science
Volume75
Issue number12
DOIs
Publication statusPublished - Dec 1 2019

Keywords

  • Curculionidae
  • Sitona
  • benzaldehyde
  • chemical communication
  • plant volatile

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Insect Science

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    Lohonyai, Z., Vuts, J., Kárpáti, Z., Koczor, S., Domingue, M. J., Fail, J., Birkett, M. A., Tóth, M., & Imrei, Z. (2019). Benzaldehyde: an alfalfa-related compound for the spring attraction of the pest weevil Sitona humeralis (Coleoptera: Curculionidae). Pest Management Science, 75(12), 3153-3159. https://doi.org/10.1002/ps.5431