Mycological method for controlling italian thistle growth

摘要

A novel pathovar has been isolated and purified, which pathovar most resembles Alternaria zinniae Pape, but has a host specificity for Italian thistle. By administering spores of this pathovar, called Alternaria sp., particularly shortly after emergence, Italian thistle growth is substantially inhibited. The spores of Alternaria sp. described in the subject invention have been deposited at the A.T.C.C. on Aug. 17, 1984 and given Accession No. 20723.