5种链格孢属植物病原真菌对10种杀菌剂的敏感性比较

离体条件下测定并比较了10种杀菌剂对番茄早疫病菌、苹果斑点落叶病菌、梨黑斑病菌、烟草赤星病菌和甘蓝黑斑病菌等5种链格孢属植物病原真菌的抗菌活性。结果表明，不同种的链格孢属病菌对同一药剂的敏感性相近；咪鲜胺、啶菌恶唑、苯醚甲环唑、异菌脲、腐霉利等5种杀菌剂对供试病菌菌丝生长的抑制活性最好，其EC₅₀在0.01～1.28 μg/mL之间；百菌清对病菌分生孢子萌发的抑制活性最高，其次是醚菌酯和嘧菌酯。

Comparison of the sensitivities of five Alternaria plant pathogens to ten fungicides

The sensitivities of 5 different Alternaria plant pathogens, Alternaria solani, A. mali, A. brassicae, A. kikuchiana and A. longipes to 10 fungicides were determined in vitro. The results showed that the sensitivity of different Alternaria species to the same fungicide was similar. Prochloraz, SYP Z048, difenoconazole, iprodione and procymidone had relatively higher activity to mycelial growth of the 5 pathogens than the other fungicides, and the 50% effective concentration (EC₅₀) values ranged from 0.01 μg/mL to 1.28 μg/mL. Chlorothalonil had the highest effect on spore germination of the pathogens tested, followed by kresoxim methyl and azoxystrobin.