黑龙江省水稻品种空育131稻瘟病菌生理小种种类及发病原因分析

Analysis on Kinds of Rice Blast Races in Kongyu 131 and Its Reasons of Pathologic Reaction

对水稻品种空育131的抗稻瘟病性、稻瘟病生理小种组成、气候条件等方面分析了其稻瘟病严重发生的原因:品种抗病性弱,稻瘟病菌生理小种种类丰富,优势小种ZD1(26.4%)、ZA49(18.9%)、ZD5(9.4%)迅速增殖和适宜的气候条件,导致2005年稻瘟病严重发生。

Analysis on the resistance to rice blast, the kinds of rice blast biological race and climate conditions through rice variety Kongyu 131 was conducted. The results showed that the reasons were infirmness of the resistance to rice blast, the complexcity of rice blast biological races, the multiplication of socials ZDI （26.4 % ）, ZA49 （18.9 %）, ZD5 （9. 4 %） and the feasible climate conditions. All of these leaded rice blast to break out.