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.
树大夫树干注药，残效期长，无污染，对天敌安全，果实无残留，可在生产中推广使用。
Trunk inoculation of Shudaifu was long lasting, pollution free, safe to natural enemies and no pesticide residue in fruits. It could be popularized in the production.
灭幼脲以其独特的杀虫方式，及其广谱、高效、低毒、低成本、残效期长等优点，被誉为“绿色农药”。
DFB is called "green pesticide" with the characters:individual mode of action, broad spectrum, high performance, hypovirulence, low cost, long residual efficient duration.
灭幼脲以其独特的杀虫方式，及其广谱、高效、低毒、低成本、残效期长等优点，被誉为“绿色农药”。
DFB is called "green pesticide" with the characters:individual mode of action, broad spectrum, high performance, hypovirulence, low cost, long residual efficient duration.
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