【摘要】 通过对原始菌样和单个夏孢子分离繁殖系的测定表明：内蒙古向日葵锈病流行区的病原菌生理小种种类为３号、２号及Ｌａｍｂｒｉｄｅｓ描述的新分离物ＣＬ１，ＣＬ３和ＣＬ４；各小种或分离物均分布在所有采集点，但以３号小种数量最大，约占９０％以上，为优势生理小种。更多还原

【Abstract】 The samples and single-uredinal isolates were tested. The results indicated that the types of race were race 3 and race 2,within Inner Mongolia sunflower rust prevalent region and some isolates were CL1,CL3 and CL4 discribed by C. J. Lambrides in 1991. Race 3 covered over all collection sites,its proportion was up to 90%,so it was predominant race in the region. The other race and isolates also were discovered in nearly all collection sites and thier proportions were much low.更多还原