Population Dynamics of Cabbage Aphid, Brevicoryne brassicae L. on Major Cole Crops in Meghalaya
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Author:Sandip Patra, N.S. Azad Thakur, Kanchan Saikia and D.M. Firake
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:99, Issue:jul-sep
DOI: https://doi.org/10.29321/MAJ.10.100143
Abstract
Population dynamics of cabbage aphid (Brevicoryne brassicae L.) was studied during 2009-10
at Entomology Farm, ICAR Research Complex for NEH Region, Umiam, Meghalaya. Cabbage,
cauliflower, knolkhol and broccoli were planted on two different dates at fifteen days interval
to study the incidence pattern of cabbage aphid. Early planted crops were relatively safer
than late planted crops in relation to aphid infestation. Mean aphid numbers per square inch
leaf area were 1.63, 1.44, 2.79 and 1.14 on first plantings and 3.15, 1.39, 3.68 and 1.68 on second
plantings cabbage, cauliflower, knolkhol and broccoli, respectively. Correlation study between
weather parameters and aphid population showed negative influence of temperature, relative
humidity and rainfall on population growth of aphid.
Key words : Cabbage, cauliflower, knolkhol, broccoli, Brevicoryne brassicae, population dynamics,
correlation studies