IN-VITRO INTERACTIONS BETWEEN TRICHODERMA-KONINGII, FUSARIUM-SOLANI AND GLOMUS-MOSSEAE

The inoculation of maize plants with spores of G. mosseae decreased th e populations of the saprophytic fungi Trichoderma koningii and Fusari um solani. However, F. solani had no effect on mycorrhizal development , whereas G. mosseae was inhibited in its extramatrical stage by T. ko ningii. Germinated spores of G. mosseae did not affect growth of the s aprophytic fungi on water-agar. T. koningii inhibited the germination, but not mycelial development of G. mosseae; this inhibition was indep endent of the change in pH of the medium. F. solani did not inhibit ge rmination of G. mosseae spores, and endophyte hyphal development was m arkedly stimulated. The influence of soluble and volatile substances p roduced by the saprophytic fungi on these effects is discussed.