稻粒黑粉病的发生与穗层及包颈关系的研究  

Relationship Between the Occurence of Rice Kernel Smut and Rice Panicle Layers and Panicle Covered

作　　者：邵见阳[1] 林姗姗[1] 张祥喜[1] 王立新[1] 

机构地区：[1]江西省农业科学院植物保护研究所

出　　处：《江西农业学报》1992年第2期118-122,共5页Acta Agriculturae Jiangxi

摘　　要：本调查研究分析表明杂交稻制种田母本稻粒黑粉病的发生与穗层及包颈有很大的关系,穗层越高,发病率越低。主茎高度低于分蘖,发病率则明显高于后者,在重病田中这一关系表现得更为明显;同一蘖位中,下层穗发病率为上层穗的2.34～4.69倍。包颈率与发病率呈正相关。6184/006。江农ⅡA/HR1004两组合株高(简称A.B组合株高)相当,其包颈率B/A=2.36,发病率B/A=3.59;同一穗层中,包颈株的病粒率明显高于不包颈株;如果包颈率较低,包颈对病粒率影响较小。There was great relation between the occurence of rice kernel smut on crossbreeding maternal plant and rice panicle layer and panicle covered. The higher the rice panicle layers was, the lower the incidence of disease. The height of main stems was lower than that of all tillers, the disease incidence of main stems was obviously more serious than that of tillers, This relation was more obvious in the seriously infected field. In the same tiller orders, the disease incidence of lower layer panicles was 2. 34-4. 69 times as serious as that of the upper layer panicles . The rate of covered panicles was directly correlative to the disease incidence. For example , the average plants height of field A (cross combination , 6148/006) was siminer to that of field B (cross combnations, Jiangnong II A/ HR1004); because the covered panicles rate of B: A was equal to 2. 36, the disease incidence of of B: A was equal to 3. 59. In the same panicle layers, the rate of covered panicle plants was obviously heavier than that of normal plants. The covered panicle influenced little upon the disease incidence as the rate of covered panicle was low.

关 键 词：稻粒黑粉病 水稻穗层 水稻包颈 病粒率 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]