Biological Control of Fusarium Oxysporum and Verticillium dahliaeBy Trichoderma harzianum and Gliocladium virens of Two Mint Species

Abstract

Fungal plant diseases are one of the major concerns to agricultural Verticilliumwhich cause wilt disease ofmint, attack most of the economically important crop plants resulting in loss of billions of dollars. Application of Trichoderma harzianum to the infested soil, at the same time, didn't affect plant height; 30 days after transplanting except with Fusarium oxysporum which resulted significantly higher plants, however after 60 days from planting, total mint plants were higher than control. The most effect was noticed with spearmint plants treated with Verticillium dahlia followed by Fusarium oxysporum.Trichodermahamatumincreased plant height compared withcontrol in most cases of soil infestation, after 30 days fromplanting. The same effect was noticed after 60 days and the bestin both mint species.