Vol. 11, Special Issue 7 (2022)

Author(s):
Himabindu Parsi, Hanumanthaswamy BC and Hemlata

Abstract:
Study on occurrence of serpentine leaf miner was carried out during 2019, Rabi at KVK farm, Shivamogga. Three parasitoids species namely Opius dissitus Muesebeck, Neochrysocharis formosa Westwood and Neochrysocharis sp. have emerged from reared larvae and pupae of leaf miner with an average per cent parasitization of 8.48%, 3.04% and 1.56%, respectively. Total per cent parasitization by the three parasitoids ranged from 0.00 to 44.28. Highest parasitization (44.28%) was noticed during 1^st week of January i.e., 13 weeks after transplanting (1^st standard week). Total average parasitization by the three parasitoids was 13.02 per cent. The highest (44.28%) parasitization rate coincided with highest leaf miner infestation during 1^st week of January. The per cent parasitization by O. dissitus showed a significant negative correlation with minimum temperature (⁰C), morning relative humidity (%) and evening relative humidity (%) with correlation co-efficient ‘r’ value of -0.709*, -0.596* and -0.664*, respectively. It had a significant positive correlation with sunshine hours (hours/day) and wind speed (kilometers/hour) with correlation co-efficient ‘r’ value of 0.512* and 0.507*, respectively.