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| 21%噻虫嗪悬浮剂与17种杀虫剂复配对苜蓿花蓟马的联合毒力及田间防效 |
| Co-toxicity and field control efficacy of thiamethoxam 21% SC combined with 17 insecticides against Frankliniella intonsa on alfalfa |
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| DOI： |
| 中文关键词: 花蓟马 噻虫嗪悬浮剂 共毒系数 增效作用 |
| 英文关键词:Frankliniella intonsa thiamethoxam suspension concentrate co-toxicity coefficient synergistic effect |
| 基金项目:宁夏重点研发计划（2019BEH03009） |
| Author Name | Affiliation | | JIANG Tong, WANG Shun-Xia, REN Jun-Ling, ZHAO Wen-Jun, PU Zhen-Ting, WANG Xin-Pu | 1. School of Agriculture, Ningxia University, Yinchuan 750021, China
2. School of Forestry and Grassland Science, Ningxia University, Yinchuan 750021, China
3. Agricultural Machinery Extension Service Center of Yuanzhou County, Guyuan 756000, China |
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| 中文摘要: |
| 【目的】筛选出对苜蓿花蓟马Frankliniella intonsa高效的杀虫剂组合及配比。【方法】本试验选择18种杀虫剂对田间采集的苜蓿花蓟马进行了毒力测定，并利用共毒因子和共毒系数对21%噻虫嗪悬浮剂与17种杀虫剂复配组合的联合毒力进行评价，选择增效作用相对较好的配比组合进行了田间试验。【结果】结果表明：18种杀虫剂毒力测定中，LC50最低的为乙基多杀菌素，最高的为溴氰菊酯，48 h LC50分别为0.03 mg/L和189.31 mg/L。除噻虫嗪与溴氰菊酯复配组合外，其余组合共毒因子均大于20，噻虫嗪与甲维盐和虫螨腈复配，增效作用相对较好。噻虫嗪与甲维盐（1∶4和2∶3）、噻虫嗪与虫螨腈（1∶4和2∶3）的复配组合增效作用明显，共毒系数分别为749.6、467.8、572.8和390.1，LC50分别为2.78 mg/L、3.25 mg/L、0.59 mg/L和1.02 mg/L。进一步的田间药效试验显示，所有复配组合防效在施药后3 d达到最大值。21%噻虫嗪悬浮剂+5%甲维盐微乳剂（1∶4）的组合防治增效最明显，防效高达92.18%，提高了6.31%~10.18%（药后1~7 d）；药后7 d，防效仍在80.00%以上。【结论】该种复配方案在蓟马的防治中具有很好的推广与应用价值。 |
| 英文摘要: |
| 【Aim】 This study aimed to screen highly effective insecticide combinations and ratios for controlling Frankliniella intonsa on alfalfa. 【Methods】 The toxicity of 18 insecticides to field-collected F. intonsa was tested. The combined toxicity of thiamethoxam 21% suspension concentrate (SC) and 17 other insecticides was evaluated using co-toxicity factor and co-toxicity coefficient. Subsequently, combinations exhibiting relatively strong synergistic effects was selected for field experiments. 【Results】The results of toxicity measurement indicated that among the 18 pesticides, the lowest LC50 was spinetoram, while the highest was deltamethrin. The respective values for 48-hour LC50 were determined to be 0.03 mg/L and 189.31 mg/L. With the exception of thiamethoxam combined with deltamethrin, all other combinations displayed co-toxic factors exceeding 20. The synergistic effect of thiamethoxam combined with emamectin benzoate or chlorfenapyr was relatively stronger. Specifically, significant synergistic effects were observed in combinations such as thiamethoxam and emamectin benzoate, thiamethoxam and chlorfenapyr at ratios of 1∶4 and 2∶3 respectively, yielding co-toxicity coefficients of 749.6, 467.8, 572.8 and 390.1; along with corresponding LC50 values of approximately 2.78 mg/L, 3.25 mg/L, 0.59 mg/L, and 1.02 mg/L, respectively. Further field efficacy tests revealed that all combinations reached their maximum efficacy at 3 days post-application. Notably, the combination of thiamethoxam 21% SC and emamectin benzoate 5% ME (in a ratio of 1∶4) exhibited the most pronounced control effect with an efficacy rate as high as 92.18%, representing an increase by 6.31%～10.18% (1~7 days after application). Even after 7 days, the control effect remained above 80%.【Conclusion】This compounding scheme has great potential for promotion and application in the control of thrips. |
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