| 4种杀虫剂对甘草胭珠蚧的防治效果 |
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| 引用本文： | 张 皓,李培贵,李生彬,吕志强,胡小平.4种杀虫剂对甘草胭珠蚧的防治效果[J].植物保护,2017,43(1):214-217. |
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| 作者姓名： | 张 皓 李培贵 李生彬 吕志强 胡小平 |
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| 作者单位： | 中国热带农业科学院热带作物品种资源研究所，农业部华南作物基因资源与种质创制重点实验室，儋州 571737 |
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| 基金项目： | 国家自然科学基金(31301672); 海南省自然科学基金(314126); 中央级公益性科研院所基本科研业务费专项(1630032015033, 1630032014032, 1630032014033) |
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| 摘 要： | 甘草胭珠蚧Porphyrophora sophorae(Arch.)是人工栽培甘草的主要害虫。采用灌根、土壤处理法研究了35%吡虫啉悬浮剂、70%噻虫嗪水分散粒剂、48%毒死蜱乳油和5%毒死蜱颗粒剂4种杀虫剂对甘草胭珠蚧的防治效果。结果表明,8月中旬施药各药剂的防治效果均低于50%,但可有效降低翌年春季田间的虫口密度;6月中旬采用35%吡虫啉悬浮剂和70%噻虫嗪水分散粒剂灌根的防效可达80%以上。建议生产中可在6月中旬或之前采用灌溉后进行35%吡虫啉悬浮剂1 500倍或70%噻虫嗪水分散粒剂7 500倍液300mL/株灌根的措施防治甘草胭珠蚧。
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| 关 键 词： | 昆虫病原线虫 斯氏线虫 异小杆线虫 腰果云翅斑螟 致病力 |
| 收稿时间： | 2016/1/14 0:00:00 |
| 修稿时间： | 2016/3/17 0:00:00 |
Control effects of four insecticides against Porphyrophora sophorae |
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| Zhang Hao,Li Peigui,Li Shengbin,Lv Zhiqiang,Hu Xiaoping.Control effects of four insecticides against Porphyrophora sophorae[J].Plant Protection,2017,43(1):214-217. |
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| Authors: | Zhang Hao Li Peigui Li Shengbin Lv Zhiqiang Hu Xiaoping |
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| Institution: | Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture, Danzhou 571737, China |
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| Abstract: | The virulence of six entomopathogenic nematodes (EPNs) strains of the families Steinernematidae and Heterorhabditidae was tested against the larvae of cashew nut borer Nephopteryx sp. in laboratory. The tested nematode strains included Steinernema carpocapsae All, S.carpocapsae Biosys, S.glaseri NC52, S.longicaudum X-7, Heterorhabditis bacteriophora H06 and H.indica LN2. The results showed that, except H.bacteriophora H06, the other nematode strains were highly virulent to the 3rd instar larvae of Nephopteryx sp., with the mortality of 80.0%-95.0% and no significant differences among the strains. Minimum mortality was observed when treated with H.bacteriophora H06, which significantly lower than that with other nematode strains. Based on the above results, the strain S.carpocapsae All was selected for the subsequent bioassay. Laboratory bioassay demonstrated that the LC50 value of strain S.carpocapsae All against the 3rd instar larvae exposed for 24 h was 22.94 IJs per individual. After 24 h exposure to S.carpocapsae All, the mortalities of the 1st, 2nd and 3rd instar larvae (72.5%-84.7%) were significantly higher than those of the 4th and 5th instar larvae (15.0%-30.0%), while the mortality of pupa was only 20% after 120 h exposure. The above result indicated that the nematode strain S.carpocapsae All had some control effect on the lower instar larvae of Nephopteryx sp. in laboratory. |
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| Keywords: | entomopathogenic nematode Steinernema Heterorhabditis Nephopteryx sp virulence |
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