Vol. 11, Issue 12 (2022)

Author(s):
Priti S Shigwan, Kumud V Naik, MS Karmarkar, PB Sanap and AV Mane

Abstract:
The field experiment was conducted to study the seasonal incidence of aphids infesting cabbage during rabi season of 2020-21 and 2021-22 at Central Experiment Station, Wakawali, Dr. Balasaheb Sawant Konkan Krishi Vidyapeeth, Dapoli. The population of aphids ranged from 0.32 to 73.00 and 2.48 to 22.44 aphids per plant during rabi 2020-21 and rabi 2021-22, respectively. During both seasons, peak population of aphids was observed in 7^th SMW. However, pooled data on both years revealed that the aphid population was in the range of 0.16 to 47.72 aphids per plant, whereas peak population was observed during 7^th SMW. The population of aphids was found to be increased continuously till the harvesting of cabbage. During rabi 2020-21, the mean population of aphids exhibited positive significant correlation with wind speed. While, other weather parameters were non-significantly correlated with aphid population. During rabi 2021-22, mean population of aphids had positive significant correlation with wind speed and bright sunshine hours, whereas negative significant correlation with morning and evening relative humidity. Remaining parameters were non-significantly correlated with aphid population. The pooled data of aphid population indicated positive significant correlation with wind speed and bright sunshine hours while negative significant correlation with morning and evening relative humidity. Other weather parameters were non-significantly correlated with aphid population.