寄主因素对稻粒黑粉病发生危害的影响  

EFFECTS OF HOST FACTORS ON THE OCCURRENCE OF RICE KERNEL SMUT

作　　者：黄富[1] 潘学贤[1] 汪远宏[1] 程开禄[1] 张长伟[1] 

机构地区：[1]四川省农科院水稻高粱研究所,泸州646100

出　　处：《西南农业学报》1995年第1期53-58,共6页Southwest China Journal of Agricultural Sciences

摘　　要：1989～1992年采用控制性试验和田间调查研究稻粒黑粉病发生危害与寄主的关系结果表明:(1)稻粒黑粉病在异花授粉水稻不育系上发生危害严重,而对自花授粉水稻几乎不造成危害.(2)水稻抽穗扬花期是病菌侵染的主要时期,病菌侵染过程和投粉受精过程基本同步进行.(3)不育系开花时间分散、持续时间长和外露柱头率高是导致发病严重的主要寄主因素.恢复系花粉量在一定程度上影响不育系发病.(4)对稻粒黑粉病应采取以药剂防治为主的综防策略.A study on the relationship between the occurrence and damage of rice kernel smut caused by Neovossia horrida and host was conducted using controlled experiments and field investigations in 1989-1992.The resultes showed that:(1)The cross-pollinated A line rice were damaged seriously by kernel smut and the diseased seed rates (DSR) were 6. 0%-25. 45%. However,the damage to the self-polliated rice was so light that the DSR was only 0.19%. (2)The growth stage from heading to flowering was the main infection period of N. horrida. The infection and the pollination took place nearly synchronously. ( 3)Scattered flowering,longer flowering time and higher stigma emergence rate of the A-lines rice were the main host factors causing serious kernel smut. The amount of pollen of restorers also affected in a certain extent to the occurrence of kernel smut of A-line rice. (4)Funggicides should be mainly used for controlling kernel smut of A-line rice,in the integrated control strategy.

关 键 词：稻粒黑粉病 发生 危害 寄主因素 水稻 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]