The Effect of Rhizoctonia Induction on Leaf Thickness of Orchids Infected by Odontoglossum ringspot virus (ORSV)

Orchids have high economic value so that they are potential to be cultivated. The species most popular with people Dendrobium and Phalaenopsis. However, there major obstacles can affect orchid growth, namely viral infections. type of virus reported infect the is ORSV. This infection inhibit plant reduce flower quality marketability. There also symptoms in form mosaic, chlorotic, streak, necrosis. One efforts overcome by utilizing mycorrhizae. Mycorrhizae used Rhizoctonia sp. Mycorrhizal associations orchids a positive effect on nutrient absorption host expected protect from purpose this study was determine induction leaf thickness Phalaenopsis amabilis discolor infected conducted using factorial completely randomized design. result difference between leaves inoculated treated Orchid mycorrhizae had highest thickness, while those viruses lowest thickness.