Antifungal effects of some common wild plant species on certain plant pathogenic fungi.
The antifungal effects of water extracts of 40 common wild plant species in Jordan, on Fusarium oxysporum, Helminthosporium sativum [Cochliobolus sativus], Alternaria solani, Cladosporium herbarum and Botrytis cinerea were investigated under lab. conditions. Plant species were different in their antifungal effects and differences in their effects on different fungi were found. Extracts of certain species inhibited growth, others stimulated growth or had no apparent effects. Differences in the persistence of antifungal effects of different plant extracts were found. Of the species tested, Inula viscosa and Anagallis arvensis proved to be the most effective. Fresh shoot extract of I. viscosa severely inhibited growth of F. oxysporum and C. sativus, while extract of A. arvensis reduced growth of C. sativus. In general, the effects of plant extracts against all fungi species tested were more pronounced at earlier compared with later incubation periods.