小麦后期叶斑病病原菌及种子带菌的研究

小麦生长后期从江苏省各地采集小麦叶斑病病叶标本420份,分离到580个菌株,其中麦根腐平脐蠕孢(Bipolaris sorokinlana(Sacc)Shoem〕、链格孢〔Ahernaria alternala(Fr)Keissler〕、黑附球菌〔Epicoccum nigrum Link〕依次各占43%、46%及10%,偶尔分离到大麦网斑内脐蠕孢〔Drechsiera teresSacc.〕Shoem〕和双色平脐蠕孢〔B.bicolor(Mitra)Shoem〕,二者合计仅占1%。从小麦的黑胚、黑尾种子分离到229个菌株,其中链格孢、麦根腐平脐蠕孢、黑附球菌、双色平脐蠕孢、大麦网斑内脐蠕孢、长孢平脐蠕孢〔B.urochloae(Putterill)Shoem〕及狗牙根平脐蠕孢〔B.cynodonlis(Marig)Shocm〕依次各占54.1%、33.2%、4.4%、3.5%、1.3%、1.3%及0.9%,嘴突凸脐蠕孢〔Exserohilumrostratum(Drechsl.)Shoem〕不等弯孢〔Curvularia inaequalis(Shear)Boedijin〕和画眉弯孢〔C.eragrotidis(P.Henn.)J.A.Meyer〕各占0.4%.双色平脐蠕孢和长孢平脐蠕孢在国内首次从小麦上分离获得.

STUDIES ON FUNGI CAUSING WHEAT LEAF SPOT AND ISOLATED FROM SEEDS OF WHEAT

580 fungi isolates isolated from when(?)leaf spot at the late growth season in Jiangsu Provincewere surveyed.The pathogens were identified mainly as Bipolaris sorokiniana,Alternaria alterna(?)a andEpicoccum nigrum and their rates were 43%,46% and 10%,respectively.229 fungi isolates were isoLatedalso from wheat seeds and the rates of these three species were 33.2%,54.1% and 4.4%,respcetively.Spe-cies B.bicolor and B.urochloae first were isolated from wheat in China and several other species,such asDrechslera teres,B.cynodontis,Exserohilum rostratum,Curvularia inaequalis and C.eragrotidis were o(?)tained,too