Behavioral responses of adult female Thrips tabaci to different plant volatiles
Author of the article:LI Cai-Hong; ZHANG Tao; LU Yan-Hui
Author's Workplace:College of Agronomy, Xinjiang Agricultural University, Urumqi 830091, China; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection, Hebei Academy of Agriculture and Forestry Sciences, Integrated Pest Management Center of Hebei Province, Baoding 071000, China
Key Words:Thrips tabaci; plant volatiles; olfactory recognition; behavior response; attract; repellent
Abstract:
[Objectives] To evaluate the preferences of female Thrips tabaci for different
plant volatiles and thereby provide a basis for developing candidate
attractants, or repellents, for this pest. [Methods] The preferences of
adult female T. tabaci for different plant volatiles at a concentration
of 1 µg/µL were determined in an olfactometer, and the effects of different concentrations of these volatiles were also
evaluated. [Results] Females displayed no significant preference
for γ-decanolactone, (+)-α-pinene, linalool,
2-phenylethyl acetate or (-)-α-pinene, compared to the n-hexane solvent control
at a concentration of 1 µg/µL (P>0.05).
However, they displayed clear preferences for the other 20 volatiles. Nonanal,
(S)-(-)-verbenone, (±)-citronellal,
nerol and 1,8-cineole were significantly attractive (P<0.05), whereas 4-acetylpyridine, o-anisaldehyde, δ-decanolactone, (Z)-3-hexenol, geraniol and
1-octen-3-ol were even more attractive (P<0.001).
Salicylaldehyde, carvacrol, (Z)-jasmone,
eugenol and allylanisole were significantly repellent to females (P<0.05), whereas methyl salicylate,
methyl jasmonate, thymol and isovaleraldehyde were even more repellent (P<0.001). The attractiveness, or
repellence, of most volatiles had a significant upward trend with increasing
concentration, and the intensity of behavioral responses was closely
related to volatile concentration. [Conclusion]
δ-decanolactone, geraniol,
1-octen-3-ol, o-anisaldehyde and 4-acetylpyridine have potential for
development as attractants of T. tabaci, whereas methyl salicylate,
methyl jasmonate and thymol are potential repellents. The results provide a
basis for developing environmentally friendly methods for controlling T.
tabaci.