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用紫外分光光度法测定了12.5％稀禾定机油乳油在甜菜上的残留动态,研究结果表明,稀禾定在甜菜及土壤中降解很快,在甜菜茎叶中半衰期为2.6～4.0h,在土壤中半衰期为2.2～5.8h。收获时甜菜叶、块根及土壤中稀禾定残留量均低于0.05mg/kg。
The results showed that diltiazem degraded rapidly in sugar beet and soil, and its half-life in stem and leaf of beet was 2.6-4.0 h. Soil half-life of 2.2 ~ 5.8h. Sugar beet leaves, root tubers and soil residues were less than 0.05mg / kg.