关键词: 生物制剂, 生物制剂, 烟草根结线虫, 防治技术

Abstract: To investigate the quality safety of strawberry in Changping district, 459 strawberry samples were selected randomly from January to May in 2017, covering 78 scale production bases and 303 farmer households in Changping. Several tests were conducted on 6 heavy metal elements including mercury, arsenic, lead, cadmium, copper and chrome, as well as 35 kinds of pesticide residues including organic chlorine, pyrethroid, carbamate, etc. Results showed that 11 pesticides were detected without excessive residue samples, and according to the actual usage of pesticide in strawberry production in Changping, isoprocarb, chlorothalonil and procymidone were classified as the medium risk pesticides; excessive cadmium was found in one sample, so cadmium was also classified as the medium risk element; test results of pesticide residue and heavy metal pollution in scale bases were better than that in farmer households. By analyzing testing data, the study indicates that Changping strawberry is still under certain risks which can be reduced by increasing test items, introducing test instruments, optimizing test methods and more monitoring with scientific management in strawberry production.