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一、材料和方法供试药剂及使用浓度:40％薯瘟锡可湿粉800倍,40％毒菌锡可湿粉800倍,60％薯瘟锡1200倍(进口),14％胶氨铜(琥珀酸铜)液剂250倍,20％C-861糊剂,30％稻丰灵(井冈霉素-杀虫双)水剂300倍,75％多菌灵可湿性粉剂200倍,设空白对照。供试品种:辽粳五号(感病品种) 试验地为自然病田,小区面积40平方米,重复三次,随机排列。于水稻孕穗期喷药一次,亩喷药液140斤,用背负式喷雾器喷叶面。收割前进行药效调查,取中间三行200穴,调查病穗率及病粒数,以病粒数求防效。
First, the materials and methods for the test agents and the use of concentration: 40% plague tin WP 800 times, 40% germ tin 800 times wettable powder, 60% plague tin 1200 times (imported), 14% glue ammonia copper (Copper succinate) 250 times, 20% C-861 paste, 30% rice Fengling (Jinggangmycin - insecticidal double) agent 300 times, 75% carbendazim WP 200 times, set blank Control. Test varieties: Liaoning japonica five (susceptible varieties) to test the natural disease, the plot area of 40 square meters, repeated three times randomly arranged. Spraying at the booting stage of rice once, acres of liquid spray 140 pounds, with a knapsack sprayer sprayed leaves. Harvest before the efficacy survey, take the middle three rows of 200 points to investigate the disease rate and the number of diseased grains in order to seek effective prevention of disease particles.