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1 为害症状 油桃疮痂病又名黑星病。油桃疮痂病由嗜果枝孢菌(Cladosporium carpophilum Thum.)侵染引起。主要为害果实,也能侵害叶片和新梢。果实发 相似文献
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陕西省猕猴桃黑斑病病原菌鉴定 总被引:2,自引:0,他引:2
To confirm the causal pathogen and damage degree of a new disease of kiwifruit-black spot in Shaanxi Province, a field investigation was conducted in Zhouzhi County and Huyi District in 2018. The pathogen was isolated from the diseased fruits and identified based on morphological characteristics, pathogenicity testing, sequence alignment and phylogenic tree analysis. The results showed that the average incidence of black spot was 65%, and the early fruiting rate was 33%. Fruits infected with black spot disease were soft-rotted after being stored for two months under low temperature conditions. The pathogenic fungi were isolated from the under skin of Cuixiang kiwifruits and the strains could produce two types of conidia, including oval α-type conidia and curved β-type conidia. Through sequences alignment of 18S rRNA, ITS, reference gene (EF1-α) and phylogenetic tree clustering analysis, it was identified for the first time that the causal pathogen causing black spot disease of Cuixiang kiwifruit in Shaanxi Province was Diaporthe eres. 相似文献
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陕西省周至县从20世纪80年代初开始人工栽培猕猴桃,目前栽培面积已发展到8667hm2,成为全国最大的猕猴桃生产基地县。自《植保技术与推广》2001年6期报道陕西省猕猴桃发生新病害——猕猴桃溃疡病以来,此病已成为本县生产中的常发病害。据本县植保站调查,2000年全县平均病园率45%,平均病株率16.65%,病指4.76;2001年平均病园率70%,平均病株率49.2%,病指20.3;2002年平均病园率65.6%,平均病株率11.3%,病指3.52。其中尤以2001年发病最为严重,全县发病面积约为6000hm2,重病园病株率达40%,最重者发病1~2a即可毁园。产量损失10%~15%,严重者达50%以… 相似文献