11种常用药剂对蔬菜朱砂叶螨的室内毒力测定

Toxicity Bioassay of 11 Common Acaricides to Carmine Spider Mite, Tetranychus cinnabarinus

采用玻片浸渍法,室内测定了11种常用药剂对北京地区蔬菜上朱砂叶螨的毒力效果。结果表明,阿维菌素对朱砂叶螨雌成螨毒力最高,其致死中浓度LC50为0.0007mg/L,甲氨基阿维菌素苯甲酸盐和氧苦·内酯的毒力较高,LC50分别为0.0130mg/L和0.1461mg/L;哒螨灵和虫螨腈的效果次之,其LC50分别为21.3122mg/L和34.8519mg/L。其他药剂如克螨特、高效氯氟氰菊酯和多杀菌素对雌成螨毒性较低,螺螨酯、氯虫苯甲酰胺和噻螨酮对朱砂叶螨雌成螨毒力很差。

The toxicity bioassay of 11 common acaricides to the adult females of carmine spider mites, Tetranychus cinnabarinus, in vegetables in Beijing area was carried out using slide-dip method in the laboratory. The results showed that abamectin had the highest toxicity with the LC50 value of 0.0007 mg/L among all the tested acaricides. Emamectin benzoate and Oxymatrine（Prosuler exhibited higher toxicity to T. cinnabarinus, having the LC50 of 0.0130mg/L and 0.1461mg/L, respectively. The LC50 of Pyridaben and Chlorfenapyr reached 21.3122mg/L and 34.8519mg/L, respectively, suggesting relative lower toxicity. However, the other 6 acarieides showed much lower toxic activity, and Envidor, Chlorantraniliprole and Hexythiazox were of the lowest toxicity to the adult females of carmine spider mites.