Effects of Two Conventional Insecticides on Male-Specific Sex Pheromone Discrimination and Mate Choice in Trichogramma chilonis (Hymenoptera: Trichogrammatidae).
Trichogramma chilonis Ishii is an important natural enemy of many lepidopterous pests on vegetables and field crops. The effects of two conventional insecticides on male-specific sex pheromone discrimination and mate choice in T. chilonis was evaluated in the laboratory. Beta-cypermethrin LC20 exposure induced decreases in male conspecific sex pheromone discrimination and mating rate in T. chilonis, and these decreases were not due to the lower locomotor activity of the surviving T. chilonis males. Spinosad LC20 exposure caused a significant decrease in male locomotor activity of T. chilonis, but did not affect male-specific sex pheromone discrimination (conspecific sex pheromone discrimination or virgin sex pheromone discrimination) or mating rate. However, there was no significant difference in specific sex pheromone discrimination, mate choice, and locomotor activity between control males and males exposed to the low concentration (LC1) of insecticide (beta-cypermethrin or spinosad). In conclusion, beta-cypermethrin LC20 exposure was harmful to male-specific sex pheromone discrimination and mate choice in T. chilonis.
Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong Province, China (wds830706@163.com; yrhe@scau.edu.cn).
Desen
D
Wang
Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, Guangdong Province, China (lhlu@gdppri.com).
Lihua
L
Lü
Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong Province, China (wds830706@163.com; yrhe@scau.edu.cn).
Yurong
Y
He
D000818:Animals; D004338:Drug Combinations; D005260:Female; D007300:Insect Control; D007306:Insecticides / Q000633:toxicity*; D008124:Locomotion / Q000187:drug effects; D018942:Macrolides / Q000633:toxicity*; D008297:Male; D010572:Pest Control, Biological; D011722:Pyrethrins / Q000633:toxicity*; D012724:Sex Attractants / Q000494:pharmacology; D012726:Sexual Behavior, Animal / Q000187:drug effects*; D014863:Wasps / Q000187:drug effects* / Q000502:physiology
D004338:Drug Combinations; D007306:Insecticides; D018942:Macrolides; D011722:Pyrethrins; D012724:Sex Attractants; C017160:cypermethrin; C415329:spinosad
behavioral trait; beta-cypermethrin; egg parasitoid; spinosad; sublethal effect