Vol. 11, Issue 6 (2022)

Author(s):
PK Regar, MK Mahla, Lekha, Aruna Parihar and Gaurang Chhangani

Abstract:
The infestation of coriander aphid initiated from third week of December, 2020 and continued up to the first week of March, 2021 with ranged from 5.00 to 66.0 aphid/plant and reached to its peak in the first week of February, 2021 with mean population of 66.0 aphid per plant. The population of coriander aphid showed with mean atmospheric temperature and sunshine hours were significant positive correlation. The abundance of predatory coccinellid beetles and spiders population observed in the fourth week of December, 2020 and reached its peak in the first week of February, 2021 (4.00 coccinellids/plant) and last week of January, 2021 (5.75 spiders/plant), respectively. The mean atmospheric temperature and sunshine hours had a significant positive correlation, whereas the mean per cent mean relative humidity had a significant negative correlation with the population of coccinellid beetles but abiotic factors were showed non-significant with the population of spiders. The coccinellid beetles and spiders population had a significant positive correlation with the mean population of coriander aphid (r = 0.704 and r = 0.580, respectively).