【摘要】 本文研究了杀菌剂甲霜灵颗粒剂及其不同剂型对马铃薯晚疫病的防治效果．两年的试验结果表明：颗粒剂的防病效应明显高于直接喷雾；在所用的三种颗粒剂型中，甲霜灵与活性炭煤灰渣制成的颗粒剂防病增产效果最佳，到生长后期防效仍在７０％以上，亩增产６７９公斤，而单独应用活性炭或煤灰渣的颗粒剂之间产量无显著差异。甲霜灵煤灰渣颗粒剂随施药浓度减少，其防效和增产幅度也降低，综合经济效益分析说明亩施入２００克２５％甲霜灵可湿性粉的煤灰渣颗粒剂最适宜推广。更多还原

【Abstract】 The efficacy of metalaxyl granule made of different materials on the control of potato late blight was Studied in two consecutive years. The field-plot experiment demonstrated that all three type of metulaxyl granule applied to the root produced better control on late blight disease than the metalaxyl spraying. Among the three type of metalaxyl granule, namely meralaxyl-charcoal, metalaxyl cinder powder and metalaxyl with mixture of charcoal and cinder powder, use of metalaxylwih mixture of charcoal and cinder powder led to the best control of the disease and highest yield increase even at late growing season, the disease controling efficiency was still above 70% which resuled in 679kg per mu increase of potato production compairing to the control plot without using any chemicals for disease control. No significant yield difference was found between the plots utilizing the granule made with either charcoal or cinder powder. The disease control efficiency of using cinder powder granule decreased with the reduction of active agent concentration contained in the granule. A comprehensive economic analysis of using cinder powder granule showed that applying 200g of metalaxyl mixed with 10kg cinder powder would be the practical one for future extension in Heiongjiang province.更多还原