PREFERENCE OF APHID IN SOME CABBAGE
VARIETIES UNDER NATURAL CONDITION IN RELATION TO ECOFRIENDLY MANAGEMENT
W. R. Ahmed, M. R. Ali, M. R. Islam* and M. M.
Rahman
*Corresponding
author; Email: rashedsau@yahoo.com
Abstract
An experiment
was carried out in the experimental field of Sher-e-Bangla Agricultural
University (SAU), Dhaka-1207 during September 2007 to February 2008 to evaluate
the performance of seven cabbage varieties against aphid infestation in
relation to sustainable management of aphid. The study comprised of seven
cabbage varieties/genotypes viz. BARI badhakopi-1/Provati, BARI
badhakopi-2/Agrodot, Atlas-70, autumn queen, Tropical queen, T-776 and Seisho
YR. Among the seven varieties, Seisho YR was least susceptible in respect of
showing minimum number of aphid population (2.73 aphids per 5 plants), lowest
number of aphid infested leaves (4.61%) and plants (18.93%). On the other hand,
Tropical queen was highly susceptible in respect of showing aphid infestation
(6.67 aphids per 5 plants and 33.80% of aphid infested plants). The incidence
of aphid was decreased with increasing the age of cabbage plants and no aphid
was observed at later stage (43 DAT) of the crop growth in case of all
varieties. The percent plant infestation of different cabbage varieties
increased with the increase of aphid numbers. Conversely, it decreased with the
decreases of aphid number.
Keywords:
Cabbage variety,
aphid infestation and level of infestation.
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Volume: Journal of
Experimental Biosciences 6(1): January 2015
