毒杀芬为有机氯杀虫剂的一种，残效期长。
Toxaphene, an organic chloride insecticide possesses a long residual period.
有机肥应首先施于小麦使玉米利用养分残效。
Organic manure should be first applied to wheat to let maize use the residual nutrients.
利用田间试验方法研究保护剂长残效除草剂解毒效应。
This paper presented the research on detoxification with antidote to long residual herbicides in greenhouse and field test.
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