5种杀螨剂对荔枝叶螨的毒力测定及田间药效  

Toxicity test and field efficacy of 5 kinds of acaricides against Oligonychus litchii

作　　者：徐淑[1] 余瑶[1] 陈凯歌[1] 贾涛[1] 陈炳旭[1] 

机构地区：[1]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

出　　处：《广东农业科学》2014年第14期83-85,120,共4页Guangdong Agricultural Sciences

基　　金：国家公益性行业(农业)科研专项(201103020);国家荔枝龙眼产业技术体系(CARS-33-06)

摘　　要：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、1.05426 mg/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110 g/L乙螨唑悬浮剂速效性较差。药后2 d,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7 d,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。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 1 765 times had the highest control effect （90.00%）, and 110g/L etoxazole SC diluted 6 500 times had the worst control effect （57.04%）. Control effects of the acaricides treatments were all above 89% after 7 days. After 15 days, all of the treatments of acaricides＇ control effects were 100.00%, except the treatments of 5% abamectin EC, and the 5% abamectin EC diluted 8 333 times had the worst control effect （91.31%）. All these 5 kinds of acaricides could meet the control requirements and had a long effective duration, so they could be used to control Oligonychus litchii.

关 键 词：杀螨剂 荔枝叶螨 毒力 田间防效 

分 类 号：S482.3[农业科学—农药学] S436.671[农业科学—植物保护]