Phialophora radicicola and Gaeumannomyces graminis on roots of grasses and cereals

摘要: Isolates of Phialophora radicicola differed from those Gaeumannomyces graminis , including both G. var. tritici and avenae by their lack pathogenicity to wheat, slower growth on agar, colony morphology failure produce perithecia under conditions that stimulated all do so. P. isolates were also distinct a weakly pathogenic fungus did not but otherwise fitted Walker's (1972) description graminis. seem be taxonomically despite similarities in phialidic conidial states modes infection runner-hyphae. High population levels present grasslands ages, except with high dicotyledonous weeds. Its was always low cereals, continuous run following grass crop. In contrast, usually at only level agricultural sports turf, associated intensive cereal cropping. The complementary field distribution these fungi is probably causally determined, because good control roots achieved inoculating the soil . Unlike graminis, either grasses or cereals; its relatively ascribed efficiency parasitism. wheat due much lower root-density crops field, high-density crop grown seed-boxes as effective establishing low, natural level.