延边烟草猝倒病病原菌鉴定及药剂防治

Heilongjiang Agricultural Sciences(2022)

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Abstract
为明确延边地区烟草猝倒病病原菌种类并开展科学的药剂防控,依据培养性状及形态特征对病原菌进行鉴定,采用菌丝生长速率法测定15种杀菌剂对病原菌的毒力,并开展25% 嘧菌酯SC防效试验.结果表明,引起延边烟草猝倒病的病原菌为瓜果腐霉菌(Pythium aphanidermatum);25% 嘧菌酯SC毒力最高,EC50≤0.01 mg·L-1,其1000倍液平均防效达84.00%,与对照药剂处理差异显著.因此,25% 嘧菌酯SC可以作为烟草猝倒病的防治药剂或轮换药剂.
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