Vol. 12, Special Issue 9 (2023)

Author(s):
Ulfat Jan, Tarique Hassan Askary, Mohd Ayoob Mantoo, Muhammad Ashraf Bhat, Faheem Jeelani Wani, Rakshanda Inayat and Shabir Ah. Ganie

Abstract:
The investigations on bio-efficacy of entomopathogenic nematode, Steinernema anantnagense SKUAST 102 against white grub, Holotrichia longipennis under laboratory conditions was carried out at Division of Entomology, FOA Wadura Sopore during 2021-2022. Bio-efficacy of Steinernema anantnagense SKUAST 102 against white grub, Holotrichia longipennis revealed that mean percent mortality of I^st, 2^nd and 3^rd instars of white grub reached up to 45.83, 37.49 and 31.94 at higher inoculums levels (4000 IJs/grub). Percent mortality increased with rise in inoculums levels and exposure time. LC₅₀ value, the required to kill 50 percent of population of white grub, Holotrichia longipennis decreased with the increase in time interval, and also the LT₅₀ value, the time consumed to kill 50 percent population varied at different inoculums level of 1000 IJs followed by 2000, 3000 and 4000IJs. It was concluded that the increasing dose of Entomopathogenic nematodes showed increasing mortality and large size of grub required higher dose of nematodes as compared to small size grub.