降解毒死蜱曲霉Y的分离和降解效能测定

毒死蜱在灭菌土壤、施用过和未施用过毒死蜱的土壤中的降解速率测定表明：土壤中的微生物在毒死蜱的降解中起着重要的作用。同时，毒死蜱在连续使用后，降解速度大大加快，说明毒死蜱可诱发降解菌的产生，从连续使用毒死蜱的土壤中分离了1株可降解毒死蝗的真菌曲霉Y。测定了曲霉Y在不同接菌量、不同温度、不同毒死蜱浓度及不同碳源浓度下对毒死蜱的降解能力，同时，还测定了曲霉Y其他杀虫剂的降解能力。图6参13。

ISOLATION OF CHLORPIRIFOS DEGRADING ASPERGILLUS SP. Y AND MEASUREMENT OF THE DEGRADATION EFFICIENCY

Degradation rates of chlorpyrifos in sterilized soil, previously untreated with chlorpyrifos and soil previously treated with chlorpyrifos were determined, respectively. The results showed that microorganisms in soils played an important role in chlorpyrifos degradation. Enhanced degradation of chlorpyrifos after successively applying of chlopyrifos indicated that using chlorpyrifos could induce degradation capability of microorganisms to chlorpyrifos. A fungal strain named Aspergillus sp.Y was isolated from the soil pre-treated with chlorpyrifos. The degradation of Aspergillus sp. Y to chlorpyrifos were determined under different temperatures, different quatities of Aspergillus sp.Y, different concentrations of carbon source and different concentrations of chlorpyrifos. The degradation of Aspergillus sp.Y to other insecticides was also determined. Fig 6, Ref 13