| 代森锌杀菌剂在西红柿、茄子和土壤中的残留动态 |
| 摘要点击 794 全文点击 1301 投稿时间：1987-06-26 |
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| 中文摘要 |
| 代森类[Ethylenebis(dithiocarbamate)]农药本身毒性低,如代森锌的大鼠口服半致死量LD50为5200mg/kg,因此多被用于水果、蔬菜以及中药植物的病害防护上,然而,六十年代末期,人们发现这类农药的主要降解产物乙撑硫脲(Ethylenethiourea)对大鼠具有致癌、致畸和致突变效应[1]。人们还发现,在食品加工过程中,食用植物中所含的代森类农药残留物,会因受热而转化成毒性高的乙撑硫脲。 |
| 英文摘要 |
| This paper deals with residues of the pesticide Zineb. Eggplant and tomato plants grown in plastic buckets were treated with ethylenethiourea-free Zineb for 1—3 times at a rate of 0.1g per plant. Plant leaves, fruits and soil samples were collected periodically. Colorimetric method was used for quantitative determination. The results show that half-life of Zineb on both eggplant and tomato leaves was determined to be about 14 days. Higher amounts of Zineb residues in the plants were observed when multiply applied. Zineb residues in the test soils disappeared much more rapidly with half-life of 3.9—4.6 days. Lower amounts of Zineb were found to be physically absorbed on eggplant and tomato fruit skin. |
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