寒地春油菜菌核病的发生与综合防治

春油菜菌核病一般田块发病率为8%～50%,重病区可达80%以上.通过研究多种栽培措施与油菜菌核病发生的关系和药剂防治菌核病的效果,建立春油菜菌核病综合防治体系.结果表明:合理轮作、垄作、中耕可降低田间菌核数,选择地势较高的田块种植,适时晚播、合理密植、施肥,防倒伏和杂草等有利于减轻病害发生.施用50%农利灵可湿性粉剂的防治效果达到88.3%,施用剂量以1.5 kg/hm2最为经济有效,盛花期和终花期喷施效果最佳.

Study on the Occurrence and Comprehensive Control of Sclerotiorum on Spring Rapeseed

The results of the study showed: the disease rate was 8%~50% generally,in serious area it could reach more than 80%.To control the disease,we should take the methods as follows: Reasonable rotation,ridge culture and cultivation to reduce the number of the sclerotinia;Planting on the higher fields,reasonable close planting and using of fertilizer to prevent lodge;Control weeds and planting latterly.The 50% Ronilan(WP) was the best for chemical control and the control effect could reach 89%,the efficient and economical dose was 1.5Kg/hm~2,the best time was at the peak of florescence and the end of florescence.