EFFECTS OF PURE AND FORMULATED AZADIRACHTIN, A NEEM-BASED BIOPESTICIDE, ON THE PHYTOPHAGOUS SPIDER-MITE, TETRANYCHUS-URTICAE KOCH

被引:28
作者
SUNDARAM, KMS
SLOANE, L
机构
[1] Forest Pest Management Institute, Canadian Forest Service, Natural Resources Canada, Ontario, P6A 5M7, 1219 Queen Street East, Box 490, Sault Ste. Marie
关键词
AZADIRACHTIN; BIOPESTICIDE; FORMULATION; DOSAGE; SPIDER MITE; REPELLENCY; TOXICITY; FECUNDITY; REPRODUCTION; MORTALITY;
D O I
10.1080/03601239509372966
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Pure azadirachtin-A (AZ-A) and four neem-based formulations (RH, MO, PT and AT) containing the insecticide isomer were tested for their repellency, toxicity and oviposition deterrence against the phytaphagous two-spotted spider mite (Tetranychus urticae Koch). Mites were placed on treated and untreated aspen (Populus tremuloides Michx.) leaf discs and their fecundity, feeding rate and mortality were assessed. Results indicated that the effects of AZ-A on T. urticae varied with formulation type and AZ-A concentration. Significant reductions in feeding and oviposition, which correlated with AZ-A concentrations, were recorded concomitantly with a significant increase in repellency. Leaf discs treated with increasing concentrations of the formulations showed increased mortality of T. urticae, reduction in the total number of eggs laid, reduced % of eggs hatched and reduced survival of emerged mites. The deterrent and biological effects decreased in the order AT>PT>MO>RH>AZ-A.
引用
收藏
页码:801 / 814
页数:14
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