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Differences in susceptibility to leaf spot caused by bipolaris sorokiniana among strains of poa annua


Canadian Journal of Plant Science 59(4): 1113-1116
Differences in susceptibility to leaf spot caused by bipolaris sorokiniana among strains of poa annua
Twenty clones of P. annua L. (annual bluegrass) were tested for susceptibility to B. sorokiniana (Sacc. in Sorok.) Shoem. isolated from diseased turf at Ottawa, Ontario [Canada]. Variation from highly resistant to very susceptible was found among these strains. Six of the 20 exhibited much greater resistance to the disease than did 4 cultivars of P. pratensis L. and 4 of bentgrass (Agrostis spp.). In the eastern Ontario and western Quebec areas at least, B. sorokiniana infection apparently plays a definite role in the frequent dying out of P. annua in July and Aug.


Accession: 005151019

DOI: 10.4141/cjps79-172



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