呋喃丹是一种内吸杀虫剂。施入土壤后可转送到茎、叶、花、果各个部分。残效期可达四十天左右。 四川平昌县是一个水稻产区,也是一个养蚕基地。在水稻栽秧时,每亩深施呋喃丹三斤,防治水稻害虫效果很好。但用后不久发现蚕子有中毒死亡现象。经调查,将施了呋喃丹的泥土取出,把没用过呋喃丹的桑 Carbofuran is a systemic insecticide. After the soil can be transferred to the stems, leaves, flowers, all parts of fruit. Residual validity of up to forty days. Pingchang County, Sichuan is a rice producing area, is also a sericulture base. When rice is planted, three kilograms of furadan per acre is deep and the effect of preventing and controlling rice pests is very good. However, shortly after use, it was found that the silkworms were poisoned and died. After investigation, will be given carbofuran soil removed, never used carbofuran Sang