Prevalence pattern and susceptible strains of order Diptera, Lepidoptera and Coleoptera among Sarson (Brassica campestris) fields under different ecological conditions

The present study was conducted at Ayub Agriculture Research Institute (AARI) and village Pansera, district Faisalabad from November, 2014 through March, 2015. Maximum population was recorded from AARI fields 51.89% (N=274) and least from Pansera fields i.e. 48.11% (N=254). Overall, significant results were recorded from AARI fields and among them, higher relative abundance (67.15%; N=184) was recorded for order Diptera. From Pensera Sarson fields, higher relative abundance (71.26%; N=181) was recorded again for order Diptera, followed by Lepidoptera (25.98%; N=66); however, least relative abundance (2.76%; N=7) was recorded for order Coleoptera. Diversity (H) was recorded maximum among AARI fields (0.0685) and least was recorded among Pansera fields (0.0635). Evenness ratio was also recorded in same context (0.0281 and 0.0264, respectively); and richness was a little bit recorded high among Pansera fields (17.7080) and least among AARI (15.1036).