Infestation of four mustard varieties by Lipaphis erysimi (Kalt) in relation to different levels of irrigation

MA Mannan, N Tarannum

Abstract

An experiment was conducted to find out the influence of three irrigation levels (no irrigation, one irrigation and two irrigation) on four mustard varieties (Tori- 7, BARI Sharisha-6, BARI Sharisha-9 and BARI Sharisha-8). The non-irrigated plots had highest aphid population (34.96/plant) and lowest (11.16 aphids/plant) in two irrigation. The variety BARI Sharisha-8 showed lowest (5.34 aphids/plant) aphid infestation and its yield was highest (2.05 ton/ha). Interaction effects indicated that the crop escaped from the aphid incidence in the variety BARI Sharisha-8 irrigated 2 times and produced highest yield (2.37 ton/ha). The differences in the aphid population at three irrigation levels affected the yield contributing characters and it was negatively correlated (correlation coefficient value ‘r’ ranged from -0.91 to 1.0).

Bangladesh J. Agril. Res. 41(4): 625-632, December 2016

Keywords

Infestation; Lipaphis erysimi (Kalt); irrigation

Full Text:

PDF


DOI: http://dx.doi.org/10.3329/bjar.v41i4.30695

Copyright (c) 2016 Bangladesh Journal of Agricultural Research