STUDIES ON SAFETY STANDARD OF BHC/DDT DUST FOR USING ON WHEAT AGAINST THE CHINESE ARMYWORM
粘虫散在小麦上安全使用标准的研究

The safety standard of BHC/DDT dust mixture for wheat was studied. The kinetics of disappearance of BHC/DDT in wheat was studied by pot experiment. The relations between the amount, frequency and date of application and the residue in wheat were studied by field experiment.The results show that milk stage can be considered as the safty period of dusting HBC/DDT on wheat against the Chinese armyworm. The amount of application and the residue for BHC or DDT is positively correlated. The level of significance ...