作　　者： ; ; ; ; ;

机构地区： 新疆生产建设兵团绿洲生态农业重点实验室

出　　处： 《北方园艺》 2013年第5期109-113,共5页

摘　　要： 为了进一步了解库尔勒香梨黑斑病菌生物学特性,通过接种试验,研究了不同外界条件因子对病原菌菌丝生长和分生孢子萌发的影响。结果表明:病原菌菌丝最适生长温度为25～28℃,最适pH为6～7;孢子萌发最适温度为28～30℃,最适pH为7。分生孢子在梨果肉和表皮上萌发率差异不显著,且在梨表皮30℃培养12h,萌发率可达95.8%。同时证明接种病菌发酵液粗体毒素可导致库尔勒香梨发病。对于7种杀菌剂室内抑制病原菌分生孢子萌发试验,得出甲基托布津对分生孢子萌发的抑制效果最好,其2 000倍液抑菌率为92%。 In order to further understand biological characteristics of the pathogen eaused Kuerle pear black spot in Xinjiang,the pathogenicity of the strain LH08 by needling methods and effection different environment factors on mycelia growth and conidium germination were studied. The results showed that the optimum temperature for mycelia growth and spore germination were 25 - 30℃, 28 - 30℃, respectively. The optimum pH value for mycelia growth was 6, and the optimum pH value for spores germination was 7. There was not significant difference in the rate of conidium germination between on the pear pulp and on the pear pericarp. The germination rate could reach 95. 8% at 30℃ for 12 h on the pear pericarp. In addition, the symptom induced by artificial inoculation with crude extract toxins produced by the strain LH08 was like the symptoms in the field, too. Further, it implied that the toxins might play an important role in infection. The results of chemical screening among seven kinds of fungicide showed that thiophanate methyl 70 % WP was most effective to inhibition conidium germination. The inhibition rate was 92% at 2 000 times diluent of thiophanate methyl.

关 键 词： 梨黑斑病 生物学特性 杀菌剂 孢子萌发

领　　域： [农业科学] [农业科学]