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- Title
Naturally occurring bioactive compounds from four repellent essential oils against Bemisia tabaci whiteflies.
- Authors
Deletre, Emilie; Chandre, Fabrice; Barkman, Barbara; Menut, Chantal; Martin, Thibaud
- Abstract
BACKGROUND: In tropical countries, netting is an effective sustainable tool for protecting horticultural crops against Lepidoptera, although not against small pests such as Bemisia tabaci, while smaller mesh netting can be used in temperate regions. A solution is to combine a net with a repellent. Previously we identified repellent essential oils: lemongrass (Cymbopogon citratus), cinnamon (Cinnamomum zeylanicum), cumin (Cuminum cyminum) and citronella (Cymbopogon winternarius). The present study was designed to identify the active compounds of these essential oils, characterise their biological activity and examine their potential for coating nets. We investigated the efficiency and toxicity of nets dipped in different solutions. We then studied the repellent effect with an olfactometer and the irritant effect by videotracking. RESULTS: Geraniol and citronellolwere the most promising net coatings owing to their repellent effect. The repellency, irritancy or toxicity varied with the product and concentration, and these features were independent, indicating that the repellent and the irritant/toxic mechanismswere not the same. The combined effects of these different compounds account for the bioactivity of themixture, suggesting interactions between the compounds. CONCLUSION: This newsustainable strategy for protecting vegetable crops against whiteflies is discussed, in addition to the use of companion plants that could produce such bioactive compounds.
- Subjects
BEMISIA; ALEYRODIDAE; BIOACTIVE compounds; ESSENTIAL oils; SWEETPOTATO whitefly
- Publication
Pest Management Science, 2016, Vol 72, Issue 1, p179
- ISSN
1526-498X
- Publication type
Article
- DOI
10.1002/ps.3987