| 东北春麦区小麦白粉菌的侵染循环 |
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| 引用本文： | 杨家书,葛泉卿.东北春麦区小麦白粉菌的侵染循环[J].植物病理学报,1992,22(1):35-40. |
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| 作者姓名： | 杨家书 葛泉卿 |
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| 作者单位： | 沈阳农业大学植物免疫研究室 |
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| 摘 要： | 小麦白粉菌(Blumeria graminis DC.Speer)可以在我国东北的南部冬麦区以菌丝垫形态潜伏在小麦苗基部叶片和叶鞘上越冬,以混在干燥保存的小麦种子中的闭囊壳越夏。自生麦苗和白粉病的野生寄主在侵染循环中不起作用。小麦白粉菌的毒力频率(Vf)分析表明,公主岭、沈阳、海城、大连和烟台的小麦白粉菌同属于一个群体。东北春麦区小麦白粉病初发日期和高空天气图分析表明,东北春麦区小麦白粉病的初侵染菌源来自胶东半岛冬麦区。在一定的天气系统控制下,小麦白粉菌的分生孢子随夏初的偏南气流,在700毫巴高度层向北传播,进入东北春麦区。随降雨沉降,并侵染小麦植株。
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| 关 键 词： | 小麦 白粉病 白粉菌 侵染循环 |
ON THE INFECTION CYCLE OF BLUMERIA GRAMINIS DC.SPEER IN NORTHEASTERN CHINA |
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| Yang Jiashu,Ge Quanqing,Wu Wei,Wu Yusan.ON THE INFECTION CYCLE OF BLUMERIA GRAMINIS DC.SPEER IN NORTHEASTERN CHINA[J].Acta Phytopathologica Sinica,1992,22(1):35-40. |
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| Authors: | Yang Jiashu Ge Quanqing Wu Wei Wu Yusan |
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| Institution: | Laboratory of Plant Immunology, Shenyang Agriculture University |
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| Abstract: | It is proved that Blumeria graminis DC.Speer is able to overwinter in the south of the Northeast China.In winter,the fungi survived on the basal leaves and sheaths of the winter wheat seedling with hyphal mats.Its cle-istothecia are able to oversummer when mixed with wheat seeds and kept under dry environment.The local volunteer wheat seedlings and wild hosts of powdery mildews are unimportant in the infection cycle of B.graminis DC.Speer.
The results of the analyses of virulence frequency (Vf) of the fungal populations indicate that the local powdery mildew populations of Gong Zhu Ling (Jilin Province),Shenyang,Haicheng,Dalian (Liaoning Province),Yantai (Shandong Province) belong to the same population,since their Vf indexes are similar.
The analysis of local primary disease development date and the high altitude synoptic chart shows that the primary infection source of the nor-theastern spring wheat region comes from Yantai winter wheat region through remote air transporation.Under the control of a definite climate system,the conidia are carried into the northeasten spring wheat region at a height of 700 mb. |
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