5种杀螨剂对荔枝叶螨的毒力测定及田间药效

用Potter喷雾法测定阿维菌素、哒螨灵、噻螨酮、螺螨酯和乙螨唑对荔枝叶螨成螨的室内毒力,并通过田间药效试验评价5种药剂对荔枝叶螨的防治效果.结果表明,阿维菌素和哒螨灵对荔枝叶螨成螨的致死中浓度LC50分别为0.18799、1.05426mg/L,噻螨酮、螺螨酯和乙螨唑3种杀螨剂对荔枝叶螨成螨无效.田间药效试验结果表明,5％阿维菌素乳油、15％哒螨灵乳油和5％噻螨酮乳油对荔枝叶螨的速效性较好,而240 g/L螺螨酯悬浮剂和110g/L乙螨唑悬浮剂速效性较差.药后2d,供试药剂各处理中15％哒螨灵乳油1 765倍处理的防效（90.00％）最高,而110g/L乙螨唑悬浮剂6 500倍处理的防效（5...

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Published in广东农业科学 Vol. 41; no. 14; pp. 83 - 85
Main Author 徐淑 余瑶 陈凯歌 贾涛 陈炳旭
Format Journal Article
LanguageChinese
Published 广东省农科院植物保护研究所/广东省植物保护新技术重点实验室,广东广州,510640 2014
Subjects
杀螨剂
毒力
田间防效
荔枝叶螨
田间防效
荔枝叶螨
毒力
杀螨剂
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ISSN1004-874X

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Summary:用Potter喷雾法测定阿维菌素、哒螨灵、噻螨酮、螺螨酯和乙螨唑对荔枝叶螨成螨的室内毒力,并通过田间药效试验评价5种药剂对荔枝叶螨的防治效果.结果表明,阿维菌素和哒螨灵对荔枝叶螨成螨的致死中浓度LC50分别为0.18799、1.05426mg/L,噻螨酮、螺螨酯和乙螨唑3种杀螨剂对荔枝叶螨成螨无效.田间药效试验结果表明,5％阿维菌素乳油、15％哒螨灵乳油和5％噻螨酮乳油对荔枝叶螨的速效性较好,而240 g/L螺螨酯悬浮剂和110g/L乙螨唑悬浮剂速效性较差.药后2d,供试药剂各处理中15％哒螨灵乳油1 765倍处理的防效（90.00％）最高,而110g/L乙螨唑悬浮剂6 500倍处理的防效（57.04％）最差;药后7d,供试药剂各处理的防效均达到89％以上;药后15 d,除5％阿维菌素乳油处理外,其余药剂处理的防效均达到100.00％,5％阿维菌素乳油8 333倍处理防效（91.31％）最差.供试的5种药剂均能达到防治要求,持效期长,可用于荔枝叶螨的防治.
Bibliography:44-1267/S
acaricides; Oligonychus litchii; toxicity; field efficacy
XU Shu, YU Yao, CHEN Kai-ge, JIA Tao, CHEN Bing-xu （Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences /Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, China）
The toxicities and field control effects of abamectin, pyridaben, hexythiazox, spirodiclofen and etoxazole against Oligonychus litchii were tested by Potter-spraying method and field efficacy trials. The results showed that the LC50 of abamectin and pyridaben to Oligonychus litchii adults were 0.18799 mg/L and 1.05426 mg/L, respectively. These 3 acaricides, hexythiazox, spirodiclofen and etoxazole, had no toxicity to Oligonychus litchii adults. Field efficacy trials showed that 5% abamectin EC, 15% pyridaben EC and 5% pyridaben EC had ready availability on Oligonychus litchii, but 240 g/L spirodiclofen SC and 110 g/L etoxazole SC were less ready availability. After 2 days, the treatment of 15% pyridaben EC diluted
ISSN:1004-874X