龙胆规范化种植中农药世高安全使用标准的研究

Study on safe use of 10% difenoconazole in GAP of Gentiana scabra

目的：制定龙胆规范化种植中农药世高的安全使用标准，以保证其施用安全有效。方法：通过测定农药世高在龙胆生长期的降解动态，计算农药世高在龙胆中的半衰期，从而制定农药世高的安全使用标准。结果：在当地的气候条件下，农药世高在龙胆茎叶上的半衰期为6．84～6．90d。结论：龙胆规范化种植中，建议农药世高喷施量应小于400g·hm^-2，安全使用间隔期为40d。

Objective： To investigate the safe use of 10% difenoconazole in planting Gentiana scabra. Method： The degradation dynamics of 10% ifenoconazole in the stems and leaves of G. scabra collecting in different time were determined by GC with ECD detection, and the half life of difenoconazole in the plant was calculated, and then the safe use method of 10% difenoconazole was formulated. Result： Under the local climatic conditions, the half life of 10% difenoconazole was 6. 84-6.90 days. Conclusion： In the good agricultural practice （GAP） of G. scabra, the maximal concentration of 10% difenoconazole is 400 g · ha^-1 , the safety interval of using 10% difenoconazole is 40 days.