| 沈迎春1, 张怡1*, 郭慧芳2, 祝树德3, 徐炜枫4.3种农药对莲藕莲缢管蚜的杀虫活性和安全性[J].植物保护,2016,42(3):236-243. |
| 3种农药对莲藕莲缢管蚜的杀虫活性和安全性 |
| Insecticidal activity of three pesticides against Rhopalosiphum nymphaeae in lotus and their safety to crops |
| 投稿时间：2015-04-14 修订日期：2015-07-23 |
| DOI： |
| 中文关键词: 莲缢管蚜 吡虫啉 啶虫脒 吡蚜酮 杀虫活性 安全性 |
| 英文关键词:Rhopalosiphum nymphaeae imidacloprid acetamiprid pymetrozine insecticidal activity safety |
| 基金项目:农业部农药检定所小作物联合登记试验项目 |
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| 中文摘要: |
| 为筛选防治莲藕莲缢管蚜的理想药剂, 比较研究了吡虫啉、啶虫脒、吡蚜酮的杀虫活性、田间防效、作物安全性和残留。结果表明, 啶虫脒对莲缢管蚜3日龄蚜虫的LC50为0.09 mg/L, 毒力显著高于吡虫啉和吡蚜酮(LC50值分别为0.26 mg/L和1.0 mg/L)。湖南、湖北、浙江、福建和山东田间试验结果表明, 吡虫啉、啶虫脒和吡蚜酮在15 g/hm2以上有效使用剂量时, 药后7 d对莲藕莲缢管蚜的防治效果均在90%以上。10%吡虫啉可湿性粉剂、5%啶虫脒乳油、25%吡蚜酮可湿性粉剂在稀释250倍及以下剂量时拌种或茎叶喷雾对莲藕植株生长均无药害。残留试验结果表明, 吡虫啉在莲叶上的半衰期为2.5~5.9 d; 啶虫脒在莲叶上的半衰期为7.4~9.5 d; 吡蚜酮在莲叶上的半衰期为0.8~1.3 d。吡虫啉、啶虫脒和吡蚜酮防治莲藕莲缢管蚜安全、高效。 |
| 英文摘要: |
| The toxicity of three pesticides, imidacloprid, acetamiprid and pymetrozine to Rhopalosiphum nymphaeae in Nelumbo nucifera Gaertn., and their safety to crops, were investigated by indoor incubation and field experiment. The results showed that the lethal concentration of 50 percent individuals (LC50)of imidacloprid, acetamiprid, pymetrozine was 0.26 mg/L, 0.09 mg/L and 1.0 mg/L, respectively, and there was a significant difference among the three pesticides in the toxicity to R. nymphaeae. No damage on the growth of N. nucifera was observed under the experimental dose with the treatment of seed dressing and stem-leaf spraying. The field experiments showed that the control efficiency was more than 90% 7 days after application in Fujian, Hunan, Zhejiang, Shandong and Hubei. Residual trails showed that the half-life of imidacloprid, acetamiprid, pymetrozine on the lotus leaf was 2.5-5.9 days, 7.4-9.5 days, and 0.8-1.3 days, respectively. Imidacloprid, acetamiprid, and pymetrozine as the easily biodegradable pesticides, remaining in the environment for a short time, are relatively environment-friendly for use. |
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