RESEARCH ARTICLE
Effects of Bio-rational Insecticides on Diamondback Moth (Plutella xylostella L.) and Cabbage Aphid (Brevicoryne brassicae L.) on Cabbage
Alemu Araya1, *, Abraha Gebretsadkan1, Ibrahim Fitiwy1, Sarah Tewelde-berhan1, Tewodros Tadesse1
Article Information
Identifiers and Pagination:
Year: 2023Volume: 17
E-location ID: e187433152307240
Publisher ID: e187433152307240
DOI: 10.2174/18743315-v17-e230828-2023-23
Article History:
Received Date: 19/4/2023Revision Received Date: 08/06/2023
Acceptance Date: 26/06/2023
Electronic publication date: 29/12/2023
Collection year: 2023
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
Background:
Cabbage is a subsistence crop for smallholder farmers in Ethiopia. Diamondback moths and cabbage aphids are among the devastating insects that cause yield losses of 90% and 30%.
Objective:
The aim was to test the efficacy of the bio-rational insecticides against diamondback moth and cabbage aphids, and their effect on cabbage yield and yield loss.
Methods:
A field experiment was conducted at the Gumsalasa micro dam with furrow irrigation during 2019/20 in Northern Ethiopia. Treatments were arranged in RCB design and replicated thrice. The experiment included five bio-rational insecticides; (R. obtusifolius), (P. dodecandra), (N. glauca), (T. minuta), (A. indica), Karate 5% EC (standard test), and control.
Results:
Phytolacca dodecandra aqueous leaf extract showed inspiring results, reducing diamondback moth larvae to 0.13 and aphid colonies to 0.16, 48 hours after the 4th spraying, leading to a higher (40.28 t ha-1) fresh cabbage yield followed by A.indica, which had reduced the invasion of diamondback moth and aphid colonies to 0.20 and 0.40 and the yield was recorded as 27.69 t ha-1 compared with 2.46 and 5.53 diamondback moth and aphid colonies, and 23.86 t ha-1 cabbage yield in the control group. Similarly, aqueous extracts of P. dodecandra showed a commendable yield (68.82%) increment over the control, and an estimated yield loss of 40.76% was recorded from the control plots due to the tested insect pests.
Conclusion:
This study concludes that foliar extracts of P. dodecandra can be used as an alternative management option to replace synthetic insecticides and thereby maintain food security.
