强螺杀粉剂现场喷粉灭螺效果评价

EVALUATION ON MOLLUSCICIDAL EFFECT OF QIANGLUOCIDE POWDER BY DUSTING IN FIELDS

目的 评价强螺杀粉剂现场喷粉灭螺效果及其现场应用价值。方法 强螺杀粉剂采用动力喷粉法,螺灭杀可湿性粉剂采用机械喷洒法进行现场灭螺试验,比较两种剂型和两种方法的灭螺效果,同时对不同灭螺方法进行费用效果分析。结果 南京龙潭试验现场强螺杀喷粉灭螺后1、3、7、15d钉螺校正死亡率和活螺密度下降率分别为88.48％、96.26％、96.96％、95.67％和87.58％、95.40％、96.14％、96.67％;螺灭杀喷洒灭螺分别为69.15％、88.01％、86.46％、85.56％和75.27％、84.99％、87.50％、87.96％。扬州仪征试验现场强螺杀喷粉后1、3、7、15d钉螺校正死亡率和活螺密度下降率分别为73.65％、98.31％、99.22％、99.26％和69.30％、98.14％、98.84％、98.60％;螺灭杀喷洒灭螺分别为18.70％、63.11％、1.25％、12.60％和34.88％、89.02％、45.37％、46.59％。强螺杀喷粉灭螺单位成本为0.20元/m2,螺灭杀喷洒为o.21元/m2。前者喷粉灭螺后15d钉螺校正死亡率和活螺密度下降率每1个百分点的费用为6.27-10.07元和6.21-10.14元;后者喷洒灭螺后15d钉螺校正死亡率和活螺密度下降率每1个百分点的费用为7.36-83.33元和7.1622.54元。结论 强螺杀粉剂喷粉灭螺操作简单、喷布均匀、效果好、费用低、不需要水源,便于现场检查与质量管理。

Objective To evaluate the molluscicidal effect and the using value of qiangluocide powder by dusting in the fields. Methods The two different ways of dusting with qiangluocide and spraying with luomiecide for controlling snails were compared in the fields, and the cost-effectiveness was analysed. Results The corrected mortalities and the reduced rates for density of snails were 88.48%, 96.26%, 96.96%, 95.67%, and 87.58%, 95.40%, 96.14%, 96.67%, respectively, on the marshland in Longtan, Nanjing, 73. 65% , 98. 31% , 99. 22% , 99. 26% and 69. 30% , 98.14%, 98.84%, 98. 60% , respectively, on the marshland in Yizheng, Yangzhou, on 1 d, 3d, 7 d, 15 d after dusting with qiangliocide power; and those on 1d, 3d, 7d, 15d after the spraying with luomiecide were 69.15%, 88.01%, 86.46%, 85.56% and 75.27%, 84.99%, 87.50%, 87.96% on the marshland in Longtan, Nanjing, 18.70%, 63.11%, 1.25%, 12.60% and 34. 88% , 89. 02% , 45.37% , 46. 59% , respectively, on the marshland in Yizheng, Yangzhou. The st of dusting with qiangluocide powder was 0. 20 yuan/m2, and that of spraying with luomiecide as 0. 21 yuan/m2 for snail control in the fields. The costs of reduced one percentage for the cor rected mortalities and the density of snail were 6. 27-10. 07 yuan and 6. 21-10. 14 yuan, respectively, on 15 d after dusting with qiangluocide power and those on 15 d after spraying with luomiecide were 7. 36-83. 33 yuan and 7. 16-22. 54 yuan , respectively. Conclusion The dusting with qiangluocide powder is a promising new formulation, which is suitable for the areas without water resource and possessed of high effectiveness against snails. The method ofdusting with qian-gluocide powder for controlling snails is simple, convenient, cheap and easy to be carried out for the inspection and quality control.