Application of Trichoderma to Prevent Phaeomoniella chlamydospora Infections in Organic Nurseries

摘要: Summary. In order to prevent or reduce infection in grapevine nurseries, greenhouse and nursery trials were carried out evaluate the effects of Trichoderma harzianum (Rootshield ® ) on morpho-physiological characteristics Phaeomoniella chlamydospora artificially inoculated potted cuttings. The long-distance activity against Botrytis cinerea was also examined. study performed a commercial where plants grown organically. Results greatly depended vine-growth stage at which applied. Treatment rooting most effective, whilst callusing-box application treatments both callusing gave inconsistent but generally negative results. further improved quantitative qualitative root system, increased percentage certifiable vines produced. Moreover, reduced necrotic area caused by B. leaves collected from Trichoderma-treated extent necrosis P. chlamydospora-inoculated This reduction significantly higher 15 months after inoculation. On other hand, vine mortality end growing season compared with untreated plants. whole, only when it applied did produce positive morpho-phisiological its tolerance stress–related diseases, such as forms esca found nursery.