辣椒死株的病原分析及药剂筛选

对德州市郊区及夏津、武城、宁津、陵县、乐陵、临邑、齐河等7个市县区的辣椒枯死情况进行了调查。通过病原鉴定，明确了德州市辣椒枯死由4种病害引起，即辣椒疫病、辣椒根腐病、辣椒枯萎病、辣椒青枯病。用生长速率法测定了5种药剂对引起辣椒枯死的主要病原辣椒疫霉菌的抑制作用。结果为50％甲霜铜WP、50％安克WP抑菌效果最为明显，在0.6-0．8mg·L^-1范围内抑菌效果在90％以上，其次是58％甲霜灵·锰辞WP，25％甲霜灵WP、72．2％普力克WP抑菌效果最差。这一结果通过田间小区药效试验得到进一步证验。

The condition of withered Capsicum is investigated in the suburbs, Xiajin, Wucheng, Lingxian, Leling, Qihe of Dezhou. By identification of pathogen, it was made clear that withered capsicum was caused by Capsicum Phytophthora blight, Capsicum root rot, Capsicum Fusarium wilt and Capsicum southern bacterial wilt. In addition, the mycelia growth inhibition of phytophthora capsici Leonian by 5 fungicides was measured, the results showed the best effective fungicides were 50%Jashuangtong WP and 50%Ande WP, which inhibited the pathogen by 90% and more, 58%Jiashuangling-mengxin was the second effective fungicide, and this conclusion was rested and verified by field plot experimentation.