TY - JOUR AU - Saranya, S. AU - Ramaraju, K. AU - Jeyarani, S. PY - 2021/09/29 Y2 - 2024/03/28 TI - Ovicidal action of different fungal pathogens against two spotted spider mite, Tetranychus urticae (Koch) under laboratory conditions JF - Journal of Biological Control JA - JBC VL - 35 IS - 1 SE - Research Notes DO - 10.18311/jbc/2021/27410 UR - https://informaticsjournals.com/index.php/jbc/article/view/27410 SP - 37-40 AB - <p>Bioassay studies were performed with ten different fungal isolates of six species against two spotted spider mite, <em>Tetranychus urticae</em>. Among different formulations, <em>Hirsutella thompsonii</em> caused significantly higher mortalities of 61.1, 35.8 and 22.1 per cent at conidial concentrations of 971, 196 and 36 conidia mm<sup>-2</sup>, respectively. At a conidial concentration of 1457 conidia mm<sup>-2</sup>, <em>Beauveria bassiana</em> isolate Bb101 caused significantly higher mortality rate of 46.9 per cent followed by <em>B. bassiana</em> isolate B2 (36.1%) and <em>Cladosporium cladosporioides</em> isolate Cc101 (32.1%). Based on the probit estimates, <em>H. thompsonii</em> was found to exert high ovicidal activity with the lowest LC<sub>50</sub> of 674 conidia mm2 against <em>T. urticae</em> eggs.</p> ER -