Ecology Journal

Ecology Journal

Ecology Journal

Ecology Journal

Efficacy of some plant extracts for controlling aphid and diamond back moth of cabbage



 

 

ABSTRACT: Cabbage (Brassica oleracea L.var. capitata) is usually infested by aphid and diamond back moth, which damage the leaves, heads and whole cabbage plant. This study assessed the dose dependent efficacy of four botanicals (Jute seeds, Corchours capsularis L; Water Gourd Leaves, Lagenaria siceraria; Lemon outer shell, Citrus limon and Turmeric leaves, Curcuma longa) to control the aphid and diamond back moth in experimental cabbage (variety Sakata F1 Hybrid Atlas 70) field during November 2019–February 2020. About 21.9% and 13.9% reduced number of aphids were found with Water gourd leaves at 5% and 10% concentrations, respectively. A high number of aphids were observed in 5% Turmeric leaves treatment. Jute seed treatments (2.5%, 5.0% and 10.0%) were found very effective against diamond back moth and protect 100% the cabbage plant from this insect. However, 10% Jute seed extract was found phyto-toxic to cabbage that deformed the leaves and stunted the plant growth, resulting 27.32% yield loss over control. Out of 13 treatments, higher yield over control was found only in five treatments (2.5% jute seed, 10% Water gourd leaves, 10% Lemon outer shell, 2.5% Turmeric leaves and 5% Turmeric leaves). 

 

Keywords: Aphid, botanicals, cabbage, diamond back moth