6种杀菌剂对马铃薯枯萎病菌的室内毒力测定

Determination for Toxicity of Six Fungicides to Fusarium Wilt Pathogen of Potato in vitro

选择75%百菌清可湿性粉剂(WP)、36%甲霜灵锰锌悬浮剂(SC)、70%恶霉灵可湿性粉剂(WP)、50%甲基硫菌灵可湿性粉剂(WP)、6%春雷霉素可湿性粉剂(WP)、22.5%抑霉唑乳油(EC)6种杀菌剂对3种马铃薯枯萎病病原菌进行室内毒力测定。结果表明:6种药剂对病原菌菌丝生长的抑制效果差异很大,50%甲基硫菌灵(WP)和22.5%抑霉唑(EC)对3种病原菌的抑菌效果均很好,EC50分别为1.69、5.59、5.03μg/mL和3.60、5.17、1.58μg/mL。

Determination for toxicity of the six fungicides, 75% chlorothalonil WP, 36% metalaxyl mancozeb SC, 70% hymexazole WP, 50% thiophanate-methyl WP, 6% kasugamycin WP, and 22.5% imazalU EC, was made to Fusarium wilt pathogen of potato in vitro. The results indicated that there was significant difference in inhibiting efficacy on the mycelial growth of the six fungicides for three pathogenic Fusarium wilt pathogens, Fusarium oxysporum, F. solani and F. tricinctum. Inhibition efficacy of 50% thiophanate-methyl WP and 22.5% imazalU EC to the three Fusarium wilt pathogens was best, with EC50 being 1.69, 5.59 and 5.03 μg/mL, and 3.60, 5.17 and 1.58 μg/mL, respectively.