Submit or Track your Manuscript LOG-IN

Population dynamics of mustard aphid on different Brassica cultivars under terai agro-ecological conditions of West Bengal

S. Choudhury and S. Pal

Department of Agril Entomology, Uttar Banga Krishi Viswavidyalaya, Pundibari, West Bengal- 736 165, India 1 Regional Research Station, U.B.K.V., Kalimpong, Darjeeling, West Bengal-734301, India.

ABSTRACT

Experiments were conducted at the Instructional Farm of Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar during rabi season of 2002-03 and 2003-04 to study the population dynamics of mustard aphid on seven popular rapeseed-mustard cultivars. The incidence of aphid commenced from 52nd to 2nd standard week with a very low population levels on all the cultivars. The aphid (Lipaphis erysimi) population attained peak level from 7th to 9th standard week. The correlation coefficients between aphid population and different abiotic factors revealed contradictory results. Except for a few instances the weather parameters showed low order of associations with aphid population. Thus, the ecological factors exhibited little impact on the population build up of mustard aphid. The degree of infestation and the rates of population change of the aphids on different Brassica cultivars seem to be governed by varietal characteristics of different germplasms. Brassica campestris varieties as a group harboured relatively higher populations of the aphid than Brassica juncea varieties.
 

 

 

To share on other social networks, click on P-share. What are these?

The Journal of Plant Protection Sciences

December

Vol. 7, Iss. 1-2, Pages 1-18

Featuring

Click here for more

Subscribe Today

Receive free updates on new articles, opportunities and benefits


Subscribe Unsubscribe