Agriculture and Natural Resource, Debremarkos University, Ethiopia, Email: kassahunyimenu41@gmail.com
Online published on 23 October, 2018.
A field experiment was conducted on three cabbage varieties in Amhara Region, Ethiopia for evaluating extracts of Nicotiana rustica against cabbage aphid Brevicoryne brassicae. The crude extracts of leaves at 2.5, 5, 7.5 g and diazinon 60% EC were evaluated, which revealed a dose dependant effect on aphid mortality. It was observed that the local variety carried more aphids. The variety Thomas gave maximum yield at 7.5 g of the tobacco extract. It was observed that aphid abundance significantly varied with variety with local variety being more susceptible.
Nicotiana rustica, Brevicoryne brassicae, extract, dose dependent mortality, varieties-local Copenhagen, Thomas, yield, susceptible variety, aphid abundance
