Abstract

Teak is affected by a few serious diseases both in nurseries and plantations. Leaf spot caused by Phomopsis sp., Colletotrichum gloeosporioides, Alternaria sp. and Curvularia sp., leaf rust by Olivea tectonae and powdery mildew by Uncinula tectonae are the major leaf diseases in nurseries in Kerala. Leaf rust, generally observed in August-February also affects the production of healthy planting stock as severe infection leads to extensive premature defoliation