Responses of brown planthopper, Nilaparvata lugens (St?l) to specific rice plant volatile organic compounds (VOCs)
Author of the article:WANG Xiao-Hui; JIN Yi-Xuan; WANG Yan-Hui; ZHONG Yan-Ni; LI Li-Kun; CHEN Fa-Jun
Author's Workplace:Insect-information Ecology Laboratory, Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China;Insect-information Ecology Laboratory, Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China;Insect-information Ecology Laboratory, Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Insect-information Ecology Laboratory, Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Insect-information Ecology Laboratory, Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Insect-information Ecology Laboratory, Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
Key Words:rice; plant volatile organic compounds (VOCs); brown planthopper; repellents or attrahents; selection behavioral response
Abstract:
[Objectives] To provide a theoretical basis for the
comprehensive management of the brown planthopper, Nilaparvata lugens (Stål), in
rice fields by investigating the behavioral responses of this pest to
specific rice plant volatile organic compounds (VOCs). [Methods] The behavioral responses of N. lugens to a total of six substances, including alkanes, alkenes,
alcohols, aldehydes, ketones and esters,
and twelve compounds, including undecane, hexadecane, heptadecane, linalool, phytol, 2-hexyl-1-decanol, limonene, myrcene, nonanal, decanal, 2-dodecanone and methyl salicylate, in rice plant VOCs, were tested in a four-arm olfactometer at dosages of 1, 10 and 100 μL/mL
with n-hexane as the solvent. [Results] Six VOCs, including linalool, methyl
salicylate, phytol, nonanal, decanal and 2-dodecone, were found to be
significantly repellant to N.
lugens, whereas only one, laurene,
was found to be significantly attractive. Linalool and methyl salicylate
significantly repelled N. lugens at all three concentrations tested. The
repellence of two VOCs increased with dosage; from 92.3% to 122.2% and 242.9%
for linalool, and from 57.1% to 70.6% and 188.9% for methyl salicylate. The
other four repellents and the single attractant significantly affected the
behavior of N. lugens at concentrations of 100 μL/mL. [Conclusion] Specific rice plant VOCs are
either repellent or attractive to N.
lugens, and could therefore
potentially be utilized to manufacture effective botanic repellents, or attractants, for the ecological control of N. lugens in rice fields.