浙江农业学报

• 环境科学 • 上一篇    下一篇

新型杀菌剂健达对桑树及家蚕的安全性评价

  

  1. (云南省农业科学院 蚕桑蜜蜂研究所,云南 蒙自 661101)
  • 出版日期:2016-04-25 发布日期:2016-04-27

Safety evaluation of new fungicide fluxapyroxadpyraclostrobin to mulberry and silkworm

  1. (Institute of Sericulture & Apiculture, Yunnan Academy of Agricultural Sciences, Mengzi 661101, China)
  • Online:2016-04-25 Published:2016-04-27

摘要: 为明确新型杀菌剂42.4%健达SC(氟唑菌酰胺与吡唑嘧菌酯复配剂)对桑树及家蚕的安全性,比较了不同浓度药剂田间喷雾后不同时间对桑树及家蚕生长发育与经济性状的影响。结果表明:42.4%健达SC 4个浓度处理对桑树均无影响;与清水对照相比,药后20 d,141和212 mg·L-1健达SC处理的桑叶对2龄起蚕的发育历期无显著影响,但是延迟了3,4,5龄期幼虫的发育历期;283和565 mg·L-1健达SC处理的桑叶均对家蚕的生长历期有延迟作用,而且对眠蚕体质量有影响;家蚕取食141和212 mg·L-1健达SC处理的桑叶后,其经济性状与清水对照和药剂对照(10%苯醚甲环唑WDG)相比无显著差异,而取食283和565 mg·L-1健达SC处理的桑叶,其全茧量、茧层量、茧层率和鲜蛹质量均显著低于清水对照和药剂对照。因此,在养蚕期间不宜在桑园及桑园周边农田喷施42.4%健达SC,使用后,其对家蚕的安全间隔期为20 d以上。

关键词: 杀菌剂, 桑树, 毒性, 家蚕, 安全性

Abstract: The aims were to investigate the safety of 42.4% fluxapyroxadpyraclostrobin SC on mulberry and silkworm. The harm to mulberry and residual toxicities to silkworm of different concentration of 42.4% fluxapyroxadpyraclostrobin SC were evaluated. The results showed that all treatments were not phytotoxic to mulberry. At 20 d after spraying, the developmental duration of 2 instar of Bombyx mori showed no difference among the groups feeding on mulberry leaf treated with 141 and 212 mg·L-1 fluxapyroxadpyraclostrobin SC and the water control, but the development period of 3, 4, and 5 instar larvae were delayed. The development periods of silkworms were delayed and body weights of tetramolter were reduced after feeding on mulberry leaf treated with 283 and 565 mg·L-1 fluxapyroxadpyraclostrobin SC. After feeding mulberry leaf treated with 141 and 212 mg·L-1 fluxapyroxadpyraclostrobin SC, the economic characters of silkworm showed no significant difference compared with the water control and 10% difenoconazole WDG group, while feeding 283 and 565 mg·L-1 processing mulberry leaf, its cocoon weight, cocoon shell, cocoon shell rate and pupa weight were significantly lower than those of the water control. Therefore, 42.4% fluxapyroxadpyraclostrobin SC was unfavorable in mulberry field and surrounding farmland during the sericulture, and its safety interval period for silkworm was longer than 20 d.

Key words: fungicide, mulberry, toxicity, silkworm, safety