| 阿维菌素对修长蠊螨的亚致死效应以及不同方式释放该螨对根结线虫的防控效果 |
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| 引用本文： | 李曼,王文朝,徐春玲,杨思华,陈淳,谢辉.阿维菌素对修长蠊螨的亚致死效应以及不同方式释放该螨对根结线虫的防控效果[J].中国生物防治学报,2018,34(6):818-824. |
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| 作者姓名： | 李曼 王文朝 徐春玲 杨思华 陈淳 谢辉 |
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| 作者单位： | 华南农业大学农学院/广东省微生物信号与作物病害防控重点实验室/植物检疫线虫检测与防疫研究中心, 广州 510642 |
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| 基金项目： | 国家重点研发计划（2017YFD0201000） |
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| 摘 要： | 本研究测定了阿维菌素对修长蠊螨的亚致死浓度及其对修长蠊螨生存、繁殖发育和捕食能力的影响，并通过盆栽试验研究了以不同方式释放修长蠊螨对空心菜根结线虫病的控制效果。阿维菌素对修长蠊螨的3个亚致死浓度LC50、LC30和LC10分别是2%的阿维菌素稀释2082倍、3760倍和8831倍。这3个亚致死剂量的阿维菌素均使修长蠊螨的生存能力、总产卵量和捕食线虫能力显著下降。修长蠊螨被LC50、LC30和LC10 3个亚致死浓度药液处理后，从幼螨发育至成螨时的存活率分别为对照的32.00%、46.00%和72.00%；总产卵量分别是对照的6.23%、17.58%和34.24%；处理2 d后的捕食线虫能力分别是对照的34.70%、53.06%和62.59%；但对卵的孵化率无显著影响。修长蠊螨控缓速释放和直接释放均能减少空心菜根系的根结数量和根结线虫卵囊数量，有效控制空心菜根结线虫的发生。各项防治处理30 d后，修长蠊螨直接释放处理、控缓速释放处理、修长蠊螨和阿维菌素联合施用处理以及仅施用阿维菌素处理的空心菜根际根结数量和线虫卵囊数量，分别比未防治对照处理减少28.97%和64.38%、49.97%和74.43%、81.92%和92.24%以及80.15%和92.69%。所以修长蠊螨控缓速释放的控制效果显著好于直接释放，但是修长蠊螨与阿维菌素联合施用不能提高防效。
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| 关 键 词： | 修长蠊螨 阿维菌素 亚致死效应 根结线虫 释放方式 |
| 收稿时间： | 2018-06-28 |
Sub-lethal Effects of Avermectin to Blattisocius dolichus (Acari: Aceosejidae) and Control Efficacy of Different Release Modes of B. dolichu against Root-knot Nematode |
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| LI Man,WANG Wenchao,XU Chunling,YANG Sihua,CHEN Chun,XIE Hui.Sub-lethal Effects of Avermectin to Blattisocius dolichus (Acari: Aceosejidae) and Control Efficacy of Different Release Modes of B. dolichu against Root-knot Nematode[J].Chinese Journal of Biological Control,2018,34(6):818-824. |
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| Authors: | LI Man WANG Wenchao XU Chunling YANG Sihua CHEN Chun XIE Hui |
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| Affiliation: | Laboratory of Plant Nematology and Research Center of Nematodes of Plant Quarantine/Guangdong Province Key Laboratory of Microbial Signals and Disease Control/College of Agriculture, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | In this research, the effects of sub-lethal doses of avermectin on the survival, reproductive development and predation ability of Blattisocius dolichus were measured, and the control efficacy of different release modes of B. dolichus against root-knot nematode disease were also studied in the potted Iponoea aqatica. Three sub-lethal doses, i.e. LC50, LC30 and LC10, against B. dolichus, were 2082, 3760 and 8831 folds dilution of 2% avermectin, respectively. All sub-lethal doses of avermectin obviously inhibited the survival, fecundity and predation of the mites. B. dolichus treated with three sub-lethal doses survived from juvenile mites to adult mites at 32.0%, 46.0% and 72.0% of the control, respectively. The treated mites showed fecundity of 6.23%, 17.58% and 34.24% of the control, respectively, and predation ability of 34.70%, 53.06% and 62.59% of the control, respectively. However, the treatment did not decrease egg hatching rate. Slow release and direct release of B. dolichus reduced the numbers of root-knots and nematode egg masses on the roots of water spinach, and effectively inhibited the occurrence of root-knot disease. Thirty days post treatments, the number of root-knots and nematode egg masses were 28.97% and 64.38%, 49.97% and 74.43%, 81.92% and 92.24%, and 80.15% and 92.69% less in the treatments of direct release of the mite, slow release of the mite, combined application of the mite and avermectin, and single application of avermectin than those in the control, respectively. Therefore, the control efficacy of slow release of B. dolichus is much better than that of direct release, and the combination of avermectin and B. dolichus shows no synergistic effects in control of root-knot nematodes. |
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| Keywords: | Blattisocius dolichus avermectin sublethal effects root-knot nematodes release methods |
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