农药学学报2016，Vol.18Issue(2)：263-267,5.DOI:10.16801/j.issn.1008-7303.2016.0035
六种杀菌剂对烟草赤星病菌菌丝生长和分生孢子萌发的抑制作用
Inhibitory activities of six fungicides against mycelial growth and conidial germination ofAlternaria alternata
摘要
Abstract
Activities of six different fungicides (flusilazole, iprodione, dimethachlon, azoxystrobin, kresoxim-methyl, carbendazim) toAlternaria alternata were determined by mycelial growth rate method and conidial germination assay. The results showed that the six fungicides showed different inhibitory activities againstA. alternata on mycelial growth and conidial germination. The most effective fungicide against the mycelial growth ofA. alternata was flusilazole, with average EC50 value of (0.34 ± 0.11) mg/L, followed by dimethachlon [(1.13 ± 0.68) mg/L] and iprodione [(2.08 ± 0.24)mg/L]. The most effective fungicide against theconidial germination ofA. alternata was azoxystrobin in combination with 100 mg/L SHAM, with average EC50 value of (0.28 ± 0.09) mg/L, followed by azoxystrobin [(5.79 ± 2.76) mg/L], kresoxim-methyl [(11.93 ± 3.93) mg/L], dimethachlon [(19.95 ± 15.94) mg/L] and iprodione [(23.33 ± 11.33) mg/L] when used alone. Carbendazim showed the lowest inhibition on both mycelial growth and conidial germination ofA. alternata, suggesting it should not be used for controlling tobacco brown spot. Further study is needed to investigate the field control efficacy of iprodione, flusilazole, azoxystrobin and kresoxim-methyl against tobacco brown spot.关键词
烟草赤星病/杀菌剂/菌丝生长/孢子萌发/抑制活性Key words
tobacco brown spot/fungicide/mycelial growth/conidial germination/inhibitory activity分类
农业科技引用本文复制引用
黄艳飞,汪汉成,陈庆元,王进,张长青,鲁红学..六种杀菌剂对烟草赤星病菌菌丝生长和分生孢子萌发的抑制作用[J].农药学学报,2016,18(2):263-267,5.基金项目
国家自然科学基金项目(31360448，31501679)；中国烟草总公司贵州省公司科技项目(201305，201336，201436) （31360448，31501679）
