4%螺威粉剂(TDS)植物灭螺剂对环境生物安全性研究

 采用室内试验测试植物灭螺剂“螺威”对斑马鱼、日本鹌鹑和青虾的毒性，评价其对环境的影响。试验前按正式试验条件先预试，求出植物灭螺剂“螺威”对斑马鱼、日本鹌鹑和青虾的毒性影响范围。正式试验时在此范围内按一定的比例级差设置若干处理浓度，每个浓度设3个重复，并设一组空白对照。4% 螺威粉剂（TDS）植物灭螺剂使用浓度高于LC₅₀值，对鸟类和虾类为中毒，对鸟的实际危害影响不大，对鱼类风险较大。

Research on Environmental Biosafety of "Lo-wei" Powder (TDS) Plant Molluscicide in 4 Percent

The purpose of the paper is to test the toxicity of the plant molluscicide “ Lo-wei ” to zebra fishes ， Japanese quails and freshwater shrimps in laboratory to evaluate its impact on the environment ． According to the rightful test conditions ， the toxicity range of the molluscicide on the zebra fish ， Japanese quail and freshwater shrimp was previous tested ． In the rightful test we set different molluscicide concentrations by a certain percentage in this range ， with 3 time repeat tests for each concentration ， and a set of contrast test ． When “ Lo-wei ” powder (TDS) concentration in 4 percent is higher than the safe level of plant molluscicide LC₅₀ value, it generates a moderate toxicity to birds and shrimps, little effect to birds actually and a greater risk to fishes ．