摘要： 通过实地调查、室内分离培养和病原鉴定，发现郑州市草坪根部病害的病原菌主要是禾德氏霉（Drechslera graminea）、立枯丝核菌（Rhizoctonia solani）、镰刀菌（Fusarium spp.）、腐霉菌（Pythium spp.）等。选用10种不同杀菌剂对草坪根病优势病原菌室内毒力测定结果表明，烯唑醇和敌力脱对禾德氏霉、立枯丝核菌均有强烈的抑制菌丝生长的作用，对禾德氏霉的EC₅₀均为0.03μg/mL，EC₉₀分别为0.25μg/mL和0.98μg/mL；对立枯丝核菌的EC₅₀分别为0.11μg/mL和0.47μg/mL，EC₉₀分别为78.06μg/mL和3.97μg/mL.五氯硝基苯对丝核菌也有较强的抑制作用。福美双对镰刀菌抑制作用较强。在小区防治试验中，对草坪根部病害效果较好的是12.5%烯唑醇WP1000倍液、40%棉花保苗剂WP500倍液、40%五氯硝基苯WP500倍液和25%敌力脱EC1000倍液，防治效果均在50%以上。

关键词: 草坪, 根部病害, 病原菌鉴定, 防治

Abstract: Through investigation,isolation and identification,we found that the dominant pathogens of turfgrass root disease in Zhengzhou area were Drechslera graminea?Rhizoctonia solani?Fusarium spp..The virulence of 10 kinds of fungicides was tested to those pathogens,and the results indicated that diniconazole and propiconazole violently inhibited the hypha growth of Drechslera graminea and Rhizoctonia solani. Their EC₅₀ to Drechslera graminea were all 0.03μg/mL,E₉₀ were 0.25μg/mL and 0.98μg/mL respectively;Their EC₅₀ to Rhizoctonia solani were 0.11μg/mL and 0.47μg/mL,EC₉₀ were 78.06μg/mL and 3.97μg/mL respectively.PCNB and thiram inhibited violently Rhizoctonia solani and Fusarium sp,respectively.The plot test indicated that 12.5% diniconazole WP 1000×、40% cotton seedling protective formulation WP 500×、40% pentacide WP 500× and 25% propiconazole EC 1000× had the better control effect to turfgrass root disease,the effects were all more than 50%.

Key words: Turfg rass, Root disease, Identification of pathogen, Control

中图分类号: 

• S43.8