STUDIES ON THE BIOLOGICAL METHODS FOR THEMANAGEMENT OF COFFEE (COFFEA ARABICA L.) COLLAR ROT(RHIOZOCTONIASOLANIKHUN) BY COFFEE BIO-CAPSULESS. Soundara Rajan, T. Siva Kumar, P. Balabaskar, R. Parthasarathy, V. Manonmani andR. Senthil RajAbstract Coffee is an important plantation crop in India. Arabica and Robusta coffee are susceptible to fungal disease.Coffee plants propagated through seeds. Rhiozoctoniasolanikhun is known to cause collar rot/damping offof coffee seedlings in the nursery beds and lead to 10-25 % mortality of seedlings under favourable conditions.For effective management of this disease by bio capsule methods the present study was carried out, tenRhiozoctoniasolanikhun isolates were collectedfrom different regions. The pathogenicity effect to produce collarrot symptoms showed that R.s tn 4 is high virulent compared to other isolates during the period of April-June were noticed. In case of bio control agents such as Bacillus subtilis(58.65%) inhibition found to bemaximum mean per cent inhibition compared to untreated control (70.50%) |