Effect of Trichoderma isolates on the viability of R. solani sclerotia
Seventeen percent of Trichoderma isolates completely inhibited sclerotial germination of R. solani after 30 days; 23% did not altogether inhibit germination but slowed down the growth rate of colonies derived from the sclerotia that formed (by 5.5 to 54%; data not shown). Surprisingly, 72% of the T. harzianum isolates completely suppressed the germination of sclerotia. Also, 80% of the isolates belonging to this species decreased the colony development from sclerotia.