不同生物杀菌剂对人参灰霉病的室内毒力及田间防效

采用菌丝生长速率法测定了14种生物杀菌剂对人参灰霉病菌的室内毒力,并进行了7种生物杀菌剂对人参灰霉病的田间药效试验。室内毒力测定结果表明:0.3%丁子香酚SL和2%蛇床子素EC对人参灰霉病菌毒力最强,其EC50分别为0.129、0.623mg/L,2%春雷霉素AS等5种生物杀菌剂对人参灰霉病菌也具有较好的抑制效果,其EC50在12.857~127.012mg/L之间。田间试验结果表明:0.3%丁子香酚SL在田间对人参灰霉病表现较高的防效,2%春雷霉素AS和3%中生菌素WP次之。初步筛选出了对人参灰霉病具有较好防效的生物杀菌剂,为人参灰霉病的安全防控提供科学依据。

Toxicity and field control effects of different biofungicides against grey mold of panax

Toxicities of 14 biofungicides against Botrytis cinerea were tested by mycelium growth rate method in laboratory, and field trials of 7 biofungicides against grey mold of panax were also conducted. Indoor bioassay showed that 0.3% eugenol SL and 2% osthole EC had the best toxicity against B.cinerea with EC50 values of 0.129 and 0.623 mg/L, respectively. 2% kasugamycin AS and other four biofungicides also had toxicity to B.cinerea with EC50 values ranged from 12.857 mg/L to 127.012 mg/L. Field trials demonstrated that 0.3% eugenol SL exhibited high control effect, 2% kasugamycin AS and 3% zhongshengmycin WP followed. Thus, the effective biofungicides were screened out for the disease control.