International Journal of Chemical Studies
Vol. 7, Issue 1 (2019)
Influence of weather parameters on the incidence of natural enemies in the cauliflower ecosystem
Author(s): G Harika, S Dhurua, N Sreesandhya, M Suresh and S Govinda Rao
Abstract: Studies were carried out from November to February, during Rabi, 2017-18 in Agricultural College Farm, Naira, to study the influence of weather parameters on the occurrence of natural enemies in cauliflower. The populations of natural enemies were recorded at regular weekly (5 days) intervals from bud initiation stage to crop maturity and correlated with the corresponding meteorological data to understand the relationship between them during the season. Among the natural enemies of insect pests of cauliflower, coccinellid predator, Coccinella septempunctata L. was found predominant in the cauliflower ecosystem. Other natural enemies like Cotesia spp., and spiders were present but in traces only. The activity of predatory ladybird beetles was started during 49th standard week (8.6 beetles per 10 plants), gradually increased and reached its peak level on 4th standard week with 20.66 beetles per 10 plants. The co-efficient of determination (R2) for coccinellids was 0.8614, which showed that the abiotic factors were able to explain the variation in the population of coccinellids to the extent of 86.14 out of 100.
Fig. 1: Influence of abiotic factors on the incidence of coccinellid population on cauliflower during Rabi, 2017-18
Fig. 2: Distribution plots depicting the mean predicted coccinellid population in cauliflower
Pages: 29-32 | 248 Views 27 Downloads
How to cite this article:
G Harika, S Dhurua, N Sreesandhya, M Suresh and S Govinda Rao. Influence of weather parameters on the incidence of natural enemies in the cauliflower ecosystem. International Journal of Chemical Studies. 2019; 7(1): 29-32.