新疆地区小麦白粉病菌寄主范围的研究

用小麦白粉病菌11个生理小种的混合菌种,对新疆地区的小麦近缘植物的7个属22个种的47份材料进行接种,除6份免疫外,其余均接种成功.用其中6个属19个种的29份小麦近缘植物产生的白粉病菌,对小麦回接,参试的29份材料全部回接成功.小麦白粉病菌对小麦近缘植物的寄生像在小麦上一样,有明显的寄生专化性.感病的小麦近缘植物的78.0%对小麦白粉病菌的感病性,随生育期增长而急剧下降.文中并对小麦白粉病中间寄主的作用进行了讨论.

THE HOST RANGE OF WHEAT POWDERY MILDEW (ERYSIPHE GRAMINIS F. SP. TRITICI) IN XINJIANG AUTONOMOUS REGION

47 entries of wild wheat relative plants from 7 gena 22 species were infected with a mixture of 11 wheat mildew races. The wild wheat relatives were collected from Xinjang Autonomous Region. The result shows that all the plant materials except six entries were infected successfully. The powdery mildew collected from 29 wild relatives of six gena 19 species were inoculated back to wheat. The inoculations were all successful. The parasitism of wheat powdery mildew races in the wild relatives had obvious specificity as in wheat. The susceptibility of 78. 0% susceptible wild plant to wheat mildew declined along with the duration of the growth. The action of the wild wheat relatives as intermediate hosts were discussed.