Inhibition of conidial germination and mycelial growth of Corynespora cassiicola (Berk and Curt) of rubber ( Hevea brasiliensis muell . Arg.) using extracts of some plants

Twenty-one plants were screened for fungicidal effects on conidial germination and mycelial growth of Corynespora cassiicola. Out of this, 5 plants (Ageratum conyzoides, Centrosema pubescene, Emilia coccinea, Ocimum basilicum and Solanum torvum) were selected for evaluation of concentration effects. Treatment in O. basilicum resulted in the lowest mycelial growth at 100% extract concentration. An in vivo evaluation showed that treatment with 100% O. basilicum resulted in disease index (D.I) of 43% which was significantly lower than the control 65% D.I at 5% level of probability.