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| 氯虫苯甲酰胺对荔枝蒂蛀虫不同虫态的室内毒力测定 |
| Virulence determination of chlorantraniliprole against different stage of Conopomorpha sinensis Bradley（Lepidoptera: Gracilariidac）in the laboratory |
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| DOI： |
| 中文关键词: 荔枝蒂蛀虫 氯虫苯甲酰胺 高效氯氟氰菊酯 毒力测定 |
| 英文关键词:Conopomorpha sinensis Bradley chlorantraniliprole lambda-cyhalothrin virulence determination |
| 基金项目:荔枝病虫害监测与绿色防治技术创新和示范推广（18200005）；广东省现代农业产业技术体系龙眼创新团队项目（2019KJ123） |
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| 中文摘要: |
| 荔枝蒂蛀虫Conopomorpha sinensis Bradley是为害荔枝和龙眼的重要害虫，其为害的隐蔽性增加了防治难度。为了探索安全、有效的药剂防治手段和明确氯虫苯甲酰胺的适合施药时期，本研究在室内条件下，以防控荔枝蒂蛀虫常用药剂高效氯氟氰菊酯为对照药，采用喷雾法和药膜法，分别测定了100、10、1、0.1和0.01 mg/L的 5个浓度梯度下，氯虫苯甲酰胺对荔枝蒂蛀虫卵、初孵幼虫的毒杀作用以及对成虫的触杀作用。研究结果表明，氯虫苯甲酰胺的5个浓度梯度对产后24 h、48 h和72 h蒂蛀虫卵孵化抑制率均显著高于高效氯氟氰菊酯；氯虫苯甲酰胺对蒂蛀虫初孵幼虫的毒力是高效氯氟氰菊酯的10倍，对荔枝蒂蛀虫初孵幼虫的LC50分别为3.32 mg/L和38.78 mg/L。而在100 mg/L浓度下氯虫苯甲酰胺和高效氯氟氰菊酯对成虫触杀的校正死亡百分率最高分别为34.36%和77.35%。综上所述，氯虫苯甲酰胺对荔枝蒂蛀虫具有较强的杀卵活性和杀初孵幼虫活性，在荔枝生产上具有潜在的应用价值；鉴于其对成虫的触杀作用不强，故建议在荔枝蒂蛀虫的产卵高峰期和初孵幼虫期使用，以期将荔枝蒂蛀虫于发生为害之前进行有效控制。 |
| 英文摘要: |
| Conopomorpha sinensis Bradley is major pest of litchi and longan. The concealment of its harm increases the difficulty of prevention and control. In order to explore the safe and effective means of pesticide control and to determine the suitable application period of chlorantraniliprole. In the laboratory a test to determine the toxicological effect of chlorantraniliprole and lambda-cyhalothrin（as control）on eggs, newly hatched larvae and adults of C. sinensis were performed using methods of spraying and contact residue under 5 concentration gradients of 100, 10, 1, 0.1 and 0.01 mg/L, respectively. The results showed that chlorantraniliprolele to the corrected hatching inhibition rate of eggs of C. sinensis which lay for 24 h, 48 h and 72 h were significantly higher than that of lambda-cyhalothrin under 5 different concentration gradients. The relative virulence ratio of chlorantraniliprole was 10 fold as that of lambda-cyhalothrin with median lethal concentrations（LC50）of 3.32 mg/L and 38.78 mg/L, respectively. In the contact residue test, the corrected mortality rates of adults of C. sinensis with chlorantraniliprole（100 mg/L）and lambda-cyhalothrin（100 mg/L）were 34.36% and 77.35%, respectively. These results suggested that chlorantraniliprole had strong insecticidal activity against the larvae of C. sinensis, but not against the adults. Chlorantraniliprole exhibit the potential to be exploited as a control strategy for this pest in litchi production. Therefore, the application of chlorantraniliprole in the peak oviposition period and early larval stage of litchi stem borer can effectively control the occurrence of litchi stem borer before damage. |
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