Evaluation of Some Plant Indigenous Materials Against Oxya Hyla Hyla (Serville) (Orthoptera: Acrididae) on Rice in Cachar District of Assam

Manika Das; D. C. Ray

Volume : IV, Issue : VIII, August - 2014

Evaluation of Some Plant Indigenous Materials Against Oxya Hyla Hyla (Serville) (Orthoptera: Acrididae) on Rice in Cachar District of Assam

Manika Das, D. C. Ray

Abstract :

Bio– efficacy of four different plants viz., Ageratum conyzoides Linn, Alstonia scholaris (L.) R.BR, Citrus grandis (L.) Osbeck and Eupatorium odoratum Linn extracts was evaluated against Oxya hyla hyla (Serville) (Orthoptera: Acrididae) on rice in cultivars’ field at Cachar District during 2012. Two (Methanol and Petroleum ether) solvents were used for preparation of the extracts. Among the two solvent extracts tested methanolic extract of A. scholaris, C. grandis and E. odoratum with 1.5% concentration showed cent per cent mortality of the pest species at 1DAT. At 3DAT and 5DAT, E. odoratum (1.0%) gave highest mortality of the pest species. At 7DAT E. odoratum (1.5%) also afforded highest mortality. No phytotoxic effect was noticed during the investigation period. In petroleum ether extract, E. odoratum (1.5%) showed highest mortality (ranged from 75.0– 100.0 %) of the pest species at all the DAT. ANOVA was employed which indicated significantly different performance among the treatments by both the extracts at all the DAT over control.