Vol. 12, Issue 4 (2023)

Author(s):
SG Parmar and LV Ghetiya

Abstract:
Studies on the effect of abiotic factors on population fluctuation of sucking pests infesting Indian beans was carried out at the Agriculture Experimental Station, Navsari Agricultural University, Paria, Dist.-Valsad (Gujarat) during Rabi 2018-19. Results revealed that an infestation of aphids, jassid and whiteflies were found at all crop growth stages. The peak activity of aphids was seen from the 1^st to 5^th standard week (1^st to 5^th week of January). Thereafter, the population of aphids decreased but remained active throughout the crop period. The higher activity of jassid was seen from the 1^st to 3^rd standard week (1^st to 3^rd week of January). The peak activity of whitefly was seen from the 4^th to 5^th standard week (4^th to 5^th week of January). The correlation study indicated that the maximum temperature (r = -0.554), minimum temperature (r = -0.870) and evening relative humidity (r = -0.599) had a significant negative correlation with the aphid population. In the case of jassid, the minimum temperature (r = -0.852) and evening relative humidity (r = -0.569) had significant negative. The minimum temperature (r = -0.823) had a highly significant negative correlation with the whitefly population.