Vol. 12, Issue 5 (2023)

Author(s):
Mohammed Isaq, Shivaleela, Prabhuraj A, Arunkumar Hosamani and Pampanna Y

Abstract:
Studies on seasonal incidence of major insect pests of cabbage was carried out during rabi season, 2021-2022 at Main Agricultural Research Station, College of Agriculture, UAS, Raichur. The results revealed that peak activity of diamond back moth was (4.4 larvae/ plant) during the 2^nd week of December (SMW 50), tobacco caterpillar population gradually increased and reached the peak (2.4 larvae/plants) during the last week of December (SMW 52), whereas beet armyworm, population noticed on 1st week of November (SMW45) and reached peak (1.5 larvae/ plant) in the last week of November (SMW 48), leaf Webber appeared during the 2^nd week of November (SMW 46) and reached peak (11.2 larvae/plant) on 1st week of January. Whereas, population of aphids reached peak with 130.6 aphids/ plant on 52^nd SMW. Correlation studies revealed that evening relative humidity (r= -0.665*) and minimum temperature (r = -0.680*) had significant and negative correlation on the larvae of tobacco caterpillar population. However, minimum temperature (r = -0.621*) had a significant negative influence on leaf Webber larvae population. Aphids population had a significant and negatively correlated with evening relative humidity (r= -0.640*) and minimum temperature (r = -0.692*).