氟伏虫脲在棉花及土壤中的残留消解动态

Study of Residue and Degradation of Chlorfluazuron ni Cotton Plant snd Soil

本文探讨了在有效防治棉铃虫、红铃虫后,氟伏虫脲在棉花及土壤中的残留动态。结果表明,氟伏虫脲在棉叶、土壤中的半衰期分别为16天和50天。在棉花生长期,每亩每次喷施5％氟伏虫脲50～100ml,施药5～6次,最后一次施药距采收间隔期20天,棉籽中的残留量不会超过目前暂用的0.1ppm标准。

The article decrible the residue and degradation of chlor-fluazuron in the cotton seed,leaves and soil after killing off Heliothis armigera and Platyedra gossypiella effectively. The GC-9A, equipped with an ECD, was used to measure the residue of chlorfluazuron. The results howed: (a) The half-life degradations of chlorfluazuron in cotton leaves and soil were 16 and 50 days respectively(b)Five oercent chlorfluazuron emulsion was sprayed on the cotton at the rate of 50-100ml per mu each time during the wholes growth period of the cotton.If the emulsion was applied 5-6 times and the preharvest interval was 20 days, the residue of chlorfluazuron in cotton seed did not exceed the provisional Limit of 0.1ppm.