Induction of Rhizoctonia resistance to odontoglossum ringspot virus (ORSV) infection on orchid leaf organ viability

Orchid plants are in great demand by the public as ornamental that have economic value and beauty of attractive flower shapes colors, especially Phalaenopsis Dendrobium. Related to this, conservation efforts needed through cultivation. However, these often hampered viral infections. One viruses trigger inhibition orchid cultivation appears is ORSV. Control relatively safe efficient can utilize mycorrhizae orchids which play a role increasing absorption plant nutrients. The use Dendrobium with induction Rhizoctonia sp. against ORSV very important alternative biofertilizer biocontrol agent. objectives this study were 1) determine effectiveness induced resistance, 2) viability leaf organs infection, 3) root resulting from resistance infection. This was conducted January 2021 – March at Botanical 2 Laboratory, Department Biology, Faculty Mathematics Natural Sciences, University Lampung. employed completely randomized factorial 6 treatments 4 replications. variable observed mycorrhizae, length, number leaves roots, width. data obtained homogenized using Levene's test then analyzed ANOVA Tukey's further 5% level. results showed occurred on 3rd day incubation. In organs, amabilis an increased response discolour decreased width, number. Meanwhile, organ, length roots.