稻粒黑粉病菌次生小孢子在植物体表芽殖附生特性研究  

Studies on the epiphytic budding of secondary sporidia of Neovossia horrida causing rice kernel smut on the plant surfaces

作　　者：黄富[1] 潘学贤[1] 程开禄[1] 刘兴义[1] 

机构地区：[1]四川省农科院水稻高粱研究所,四川泸州646100

出　　处：《西南农业学报》2003年第2期59-62,共4页Southwest China Journal of Agricultural Sciences

基　　金：中国水稻科学发展基金资助

摘　　要：通过控制性试验和田间调查表明,稻粒黑粉病菌次生小孢子可在供试的9种植物体表芽殖附生,在四川泸州其附生持续时间可达10月下旬,芽殖附生的次生小孢子形态、大小无明显变化,以香蕉状次生小孢子为主,最高可达95 3%。气候因素中适温、高湿有利于田间次生小孢子芽殖附生,孢子量上升。赤霉素(九二○)可促进芽殖附生,杀菌剂多菌灵对芽殖附生有显著的抑制作用。Controlled inoculation experiment and systematical investigation showed that Neovossia horrida causing rice kernel smut had the epiphytic budding character on the surfaces of 9 species plants.The epiphytic budding of the secondary sporidia existed on the surfaces of rice and weeds from April to October in field.The form and size of the secondary sporidia produced by epiphytic budding for different time on the rice plant surfaces were not significantly different.The secondary sporidia of N.horrida were needleshaped and bananashaped,and most of the secondary sporidia produced by epiphytic budding were bananashaped with the percentage of 953?%.It was favourable to epiphytic budding of the secondary sporidia on the surfaces of rice and weeds in field that the daily average temperature was about 249?℃ and the relative humidity was higher than 88?%.

关 键 词：稻粒黑粉病菌 次生小孢子 植物体表 芽殖附生特性 赤霉素 多菌灵 田间发病 接种体 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]