Abstract:
Twenty three cultivars of Brassica were screened for their susceptibility to aphids, during 2000-2001. Brassica napes (var. Bulbul-98) was found to be most susceptible with maximum population of aphids 70.66 aphids. Brassica campestris (var. Peeli sarson) was found to be tolerant with minimum population of 41.74 aphids per 10 cm inflorescence. Amongst aphids, Lipaphis erysimi was found dominant over Brevicoryne brassicae. As regards the population of predators, Peeli sarson and Brassica juncea (var.Toria) showed maximum population of Coccinella septempunctata (L.), whereas Bulbul-98 showed maximum individuals of Chrysoperla carnea (Stephen). The observations made on February 26, 2001 showed maximum population of both the predators having positive and significant correlation with L. erysimi and B. brassicae.
Page(s):
195-198
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Zoology, Volume: 39, Issue: 3, Year: 2007