Variation of resistance response of orchids induced by Rhizoctonia against the infection of Odontoglossum ringspot virus (ORSV) based on percentage of disease development

Orchid is one of the largest groups flowering plants that are in great demand by society. Besides, various flowers with a long vase life, price orchids also stable and affordable. Phalaenopsis Dendrobium most popular types orchids. To anticipate this, orchid cultivation needs to be improved. However, not always accompanied effort disease prevention, particularly those caused viruses. The virus infects Odontoglossum ringspot (ORSV). Symptoms appear on leaves chlorosis, mosaic pattern lines, circles, necrotic rings/rings. Control viral infections can utilize organisms able induce resistance, namely mycorrhizae. Mycorrhizae will penetrate into root cortex tissue provide nutrients for orchid. quite often found Rhizoctonia applied induction Induction was undertaken planting inoculum until anatomically peloton structure (solid coils) formed roots. aim this study response form percentage incidence intensity level plant resistance ORSV infection amabilis discolour which had been induced Rhizoctonia. This research conducted at Laboratory Botany, Biology, FMIPA, Universitas Lampung, using factorial completely randomized design (CRD). Factor 1 type factor 2 mycorrhizal induction, inoculation, combination both 4 replications. finding indicated more susceptible than based higher disease. Mycorrhizal inoculation (MAV) showed an increase compared amabilis.