TY - JOUR AU - Sasidharan, K. R. AU - Varma, R. V. PY - 2005/12/14 Y2 - 2024/03/29 TI - Laboratory Evaluation of Beauveria bassiana (Balsamo) Vuillemin against Indarbela Quadrinotata walker (Lepidoptera: Metarbelidae) - A Key Pest of Casuarina equisetifolia L. in Tamil Nadu JF - Journal of Biological Control JA - JBC VL - 19 IS - 2 SE - Research Notes DO - 10.18311/jbc/2005/3555 UR - https://informaticsjournals.com/index.php/jbc/article/view/3555 SP - 197-200 AB - The bark eating caterpillar, Indarbela quadrinotata Walker is a serious pest of Casuarina equisetifolia in Tamil Nadu State. Survey conducted in plantations located in different parts of the State resulted in detection of a potential strain of the biocontrol agent, <em>Beauveria bassiana</em>. Laboratory evaluation of <em>B. bassiana</em> against l. quadrinotata revealed that the fungal suspension at concentrations of 2 x 10<sup>6</sup>, 2 x 10<sup>7</sup> and 2 x 10<sup>8</sup> spores/ml was able to kill 66.67 per cent larvae. The fungus at a concentration of 4 x 10<sup>8</sup> spores/ml gave 100 per cent mortality of the test larvae. The LC<sub>50</sub> at 240 hours was 1.6 x 10<sup>6</sup> spores/ml and the LT<sub>50</sub> for the most effective concentration was 82.86 hours. ER -