Combined Application of Trichoderma harzianum and Paclobutrazol to Control Root Rot Disease Caused by Rhizoctonia solani of Tomato Seedlings

Many root diseases can cause serious damage to tomato (Solanum lycopersicum L.) production during the seedling growth period, particularly Rhizoctonia solani, Pythium spp., and Alternaria spp. Paclobutrazol (PBZ) has proved reduce of blight disease on seedlings. The present investigation was designated evaluate infected seedlings with R. solani under applications Trichoderma harzianum alone, PBZ both T. harzianum, comparing applied fungicide. enhanced chlorophyll system in seedlings, enzymatic antioxidants, total besides vegetative parameters. combined application significantly improved parameters, decreased damping off percent as well increased antioxidants It found that applying 100 mg L?1 did not affect effectiveness biocontrol agent harzianum. images scanning electron microscope (SEM) confirm showed twisting, shrinking, collapsing lysis hyphae cultures solani. This is first report confirms biochemical control using Further studies are still needed test more species different phytopathogens.