Two compounds (trans-1R,3R-chrysanthemyl R-2-methylbutanoate and R-lavandulyl R-2-methylbutanoate) identified from aeration extracts of virgin female Madeira mealybug, Phenacoccus madeirensis Green (Hemiptera: Pseudococcidae), were synthesized and tested in field bioassays in northern Taiwan over a 1-mo period. In total, 1,492 male P. madeirensis were captured in sticky traps. Our results showed that 1 µg of synthetic trans-1R,3R-chrysanthemyl R-2-methylbutanoate released from a plastic tube dispenser was attractive to the mealybugs. Different stereoisomers of chrysanthemyl 2-methylbutanoate also were tested. The insect-produced stereoisomer was the most attractive of all the isomers tested, and the stereochemistry of the acid moiety proved to be more critical than that of the alcohol moiety. The minor component found in extracts, R-lavandulyl R-2-methylbutanoate, alone was not attractive to male Madeira mealybugs nor did it act synergistically or additively with the main component.
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1 June 2011
Chirality and Bioactivity of the Sex Pheromone of Madeira Mealybug (Hemiptera: Pseudococcidae)
Hsiao-Yung Ho,
Chi-Hung Ko,
Chao-Chih Cheng,
Yu-Ting Su,
Someshwar Pola
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Journal of Economic Entomology
Vol. 104 • No. 3
June 2011
Vol. 104 • No. 3
June 2011
chrysanthemyl 2-methylbutanoate
field bioassay
lavandulyl 2-methylbutanoate
Madeira mealybug
stereochemistry