水稻穗褐变病主要病原菌侵染时期及致病力研究  

Infection period and virulence of the main pathogens isolated from browning panicle of rice

作　　者：台莲梅[1] 姜小玉 靳学慧[1] 张亚玲[1] 左豫虎[1] TAI Lianmei;JIANG Xiaoyu;JIN Xuehui;ZHANG Yaling;ZUO Yuhu(College of Agronomy,Heilongjiang Bayi Agricultural University,Heilongjiang Provincial Key Laboratory of Crop-Pest Interaction Biology and Ecological Control,Daqing 163319,China;Organization Department of the County Party Committee in Zhaozhou,Heilongjiang Province,Daqing 166400,China)

机构地区：[1]黑龙江八一农垦大学农学院,黑龙江省作物-有害生物互作生物学及生态防控重点实验室,大庆163319 [2]黑龙江省大庆市肇州县委组织部,大庆166400

出　　处：《植物保护》2021年第5期152-157,共6页Plant Protection

基　　金：黑龙江省应用技术研究与开发计划(GA19B104);黑龙江省农垦总局重点科研计划(HNK125B-03-02)。

摘　　要：为了解黑龙江省水稻穗褐变病主要病原菌侵染时期及致病性情况,分别于水稻破口期、扬花期、乳熟初期采用禾谷镰孢Fusarium graminearum、链格孢Alternaria alternata、稻黑孢Nigrospora oryzae、黑附球霉Epicoccum nigrum对水稻穗进行注射和喷雾接种。结果表明,4种病原菌在水稻破口后即可侵染稻穗使谷粒颖壳变褐。注射接种稻穗谷粒褐变重于喷雾接种。4种病原菌的致病力存在明显差异,禾谷镰孢致病力最强,链格孢的致病力弱于禾谷镰孢。In order to understand the infection period and virulence of the main pathogens isolated from browning panicle of rice in Heilongjiang,Fusarium graminearum,Alternaria alternata,Nigrospora oryzae and Epicoccum nigrum were inoculated at the rupturing stage,flowering stage and the early milk-ripe stage of rice panicle by injecting and spraying conidia suspension.The results showed that the rice panicle could be infected by four pathogens and caused browning grain glumes at the rupturing stage.Injecting inoculation caused more serious browning grains than spraying inoculation.The virulence of four pathogens was obviously different.The virulence of F.graminearum was the strongest,followed by A.alternata,while that of N.oryzae and E.nigrum were weaker.

关 键 词：水稻 穗褐变病 侵染时期 致病力 

分 类 号：S435.111[农业科学—农业昆虫与害虫防治]