摘要
[Objective]The paper was to evaluate the safety of 45%prochloraz EW in ginger,and to study the residue and degradation of 45%prochloraz EW in ginger.[Method]45%Prochloraz EW was sprayed once at the dose of 455.625 g a.i./ha in dynamic degradation test,and ginger plants were collected at 2 h,1,3,5,7,14,21,28,35 and 42 d post spraying,respectively.45%Prochloraz EW was sprayed at the doses of 303.75 and 455.625 g a.i./ha for 2-3 times with an interval of 7 d in final residue test,and ginger plants were collected at 7,14 and 21 d post spraying,respectively.The content of prochloraz was quantitatively analyzed by gas chromatography.[Result]Dynamic degradation test demonstrated that prochloraz degraded quickly in plants,and the half-life in Shandong and Anhui were 5.8 and 7.9 d,respectively.The final residue of prochloraz in ginger samples was<0.01-0.145 mg/kg,lower than the maximum residue limit of prochloraz in ginger formulated by European Union(0.2 mg/kg).[Conclusion]Prochloraz should be sprayed at the recommended dose of 202.5-303.75 g a.i./ha for prevention and control of anthracnose on ginger.The agent should be sprayed twice in the early stage of incidence,with an interval of 7 d,and the safety interval of 14 d was safe.
[Objective] The paper was to evaluate the safety of 45% prochloraz EW in ginger, and to study the residue and degradation of 45%prochloraz EW in ginger. [Method] 45% Prochloraz EW was sprayed once at the dose of 455.625 g a.i./ha in dynamic degradation test, and ginger plants were collected at 2 h, 1, 3, 5, 7, 14, 21, 28, 35 and 42 d post spraying, respectively. 45% Prochloraz EW was sprayed at the doses of 303.75 and 455.625 g a.i./ha for 2-3 times with an interval of 7 d in final residue test, and ginger plants were collected at 7, 14 and 21 d post spraying,respectively. The content of prochloraz was quantitatively analyzed by gas chromatography. [Result] Dynamic degradation test demonstrated that prochloraz degraded quickly in plants, and the half-life in Shandong and Anhui were 5.8 and 7.9 d, respectively. The final residue of prochloraz in ginger samples was <0.01-0.145 mg/kg, lower than the maximum residue limit of prochloraz in ginger formulated by European Union(0.2 mg/kg).[Conclusion] Prochloraz should be sprayed at the recommended dose of 202.5-303.75 g a.i./ha for prevention and control of anthracnose on ginger.The agent should be sprayed twice in the early stage of incidence, with an interval of 7 d, and the safety interval of 14 d was safe.
基金
Supported by Agricultural Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences(CXGC2018E19).
