Push-pull effects of three plant secondary metabolites on oviposition of the potato tuber moth, Phthorimaea operculella.
The push-pull effects of three plant secondary metabolites, azadirachtin, eucalyptol, and heptanal, on the oviposition choices of potato tubers by the potato tuber moth, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) were tested in the laboratory. Azadirachtin at concentrations from 1.5 to 12 mg/L had a significant repellent effect on oviposition. Eucalyptol at concentrations from 3 to 12 mg/L promoted oviposition. Heptanal promoted oviposition at low concentrations from 0.1875 to 3.0 mg/L but repelled it at higher concentrations from 12 to 24 mg/L. The combination of azadirachtin (12 mg/L) with eucalyptol (3.0 mg/L) resulted in a significant pushpull effect of 56.3% on oviposition. The average maximum push-pull effects occurred with the combinations of azadirachtin with heptanal (12 and 0.375 mg/L, respectively; 38.7% push-pull effect), heptanal with eucalyptol (12 and 6 mg/L, respectively; 31.4% push-pull effect), and heptanal (high concentration) with heptanal (low concentration) (12.0 and 0.375 mg/L, respectively; 25% push-pull effect).
1 Plant Protection College, Yunnan Agricultural University, Kunming 650201 P. R. China.
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D000447:Aldehydes / Q000494:pharmacology; D000818:Animals; D003511:Cyclohexanols / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D000077591:Eucalyptol; D005260:Female; D007300:Insect Control; D007302:Insect Repellents; D036701:Limonins / Q000494:pharmacology; D039821:Monoterpenes / Q000494:pharmacology; D009036:Moths / Q000187:drug effects*; D010058:Oviposition / Q000187:drug effects; D010675:Pheromones; D010936:Plant Extracts / Q000494:pharmacology*; D035281:Plant Tubers; D011198:Solanum tuberosum
D000447:Aldehydes; D003511:Cyclohexanols; D007302:Insect Repellents; D036701:Limonins; D039821:Monoterpenes; D010675:Pheromones; D010936:Plant Extracts; C010411:insect attractants; C046204:heptanal; C010329:azadirachtin; D000077591:Eucalyptol