| 明飞辰，胡守印，王 克，张友军，王少丽,,不同药剂对番茄潜叶蛾幼虫和卵的毒力及防效研究[J].环境昆虫学报,(): |
| 不同药剂对番茄潜叶蛾幼虫和卵的毒力及防效研究 |
| Toxicity and control efficacy of different insecticides on the larvae and eggs of Tuta absoluta |
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| DOI： |
| 中文关键词: 番茄潜叶蛾 杀虫剂 毒力测定 田间防效 |
| 英文关键词:Tuta absoluta insecticide toxicity bioassay control efficacy |
| 基金项目: |
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| 摘要点击次数: 11 |
| 全文下载次数: 13 |
| 中文摘要: |
| 为筛选获得对番茄潜叶蛾Tuta absoluta具有高毒力活性及优良防治效果的防控药剂，本研究采用叶片浸渍法和叶面喷雾法，开展不同药剂对番茄潜叶蛾的幼虫和卵的毒力测定及其田间防治效果比较研究。生物测定结果表明，甲氨基阿维菌素苯甲酸盐、乙基多杀菌素和溴虫氟苯双酰胺对番茄潜叶蛾幼虫具有较高毒力，其LC50值分别为0.17 mg/L、0.36 mg/L和0.43 mg/L，Bt G033A对幼虫的毒力略低（LC50=8.01 mg/L），联苯菊酯对幼虫毒力最低。对番茄潜叶蛾卵的生测结果表明，乙基多杀菌素对卵的毒力活性最高，LC50值为4.80 mg/L，显著高于甲氨基阿维菌素苯甲酸盐（LC50=16.24 mg/L）和溴虫氟苯双酰胺（LC50=65.79 mg/L），联苯菊酯和Bt G033A对卵的毒力活性很低。田间防效结果表明，除联苯菊酯外，其他杀虫剂对番茄潜叶蛾幼虫的防效高，其中溴虫氟苯双酰胺防效最高，药后7 d防效达93.51%。测试药剂对卵孵化的抑制作用存在显著差异，其中，甲氨基阿维菌素苯甲酸盐、溴虫氟苯双酰胺和乙基多杀菌素均对卵孵化有较强的抑制作用且对后续孵化幼虫防效高，联苯菊酯对幼虫和卵的防治效果显著低于其他测试药剂。说明，甲氨基阿维菌素苯甲酸盐、乙基多杀菌素、溴虫氟苯双酰胺和Bt G033A对番茄潜叶蛾幼虫防效良好，其中前三种药剂也具有较强的杀卵活性，可作为该虫化学防治中的优选药剂。 |
| 英文摘要: |
| To obtain effective insecticides with high toxicity and control effects against the tomato leaf miner, Tuta absoluta, this study adopted the leaf dipping method and foliar spraying method to evaluate the toxicity activities of different insecticides on the larvae and eggs of T. absoluta, as well as to compare their field control efficacy. The bioassay results showed emamectin benzoate, spinetoram, and broflanilide exhibited high toxicity against T. absoluta larvae with the LC50 values of 0.17 mg/L, 0.36 mg/L, and 0.43 mg/L respectively. The Bt G033A had relatively lower toxicity with the LC50 value of 8.01 mg/L, while bifenthrin showed the lowest toxicity against larvae. For T. absoluta eggs, spinetoram had the highest toxicity with an LC50 of 4.80 mg/L, significantly higher than emamectin benzoate (LC50 = 16.24 mg/L) and broflanilide (LC50 = 65.79 mg/L). Bifenthrin and Bt G033A showed low toxicity against eggs. Field efficacy trials indicated that all the tested insecticides except bifenthrin showed higher control on larvae, with broflanilide achieving the highest efficacy, reaching 93.51% seven days post-application. The inhibition of egg hatching varied significantly among different insecticides. Emamectin benzoate, spinetoram and broflanilide had strong inhibitory effects on the egg hatching and high efficacy against subsequent hatched larvae. Bifenthrin's efficacy against both larvae and eggs was significantly lower compared to other tested insecticides. It is concluded that emamectin benzoate, spinetoram, broflanilide, and Bt G033A are highly effective in controlling T. absoluta larvae. Among these, the first three insecticides also demonstrate significant ovicidal activity, making them preferable options for chemical control of this pest. |
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