alexa Exploiting the Insecticidal Potential of the Invasive S
ISSN: 2329-8863

Advances in Crop Science and Technology
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Research Article

Exploiting the Insecticidal Potential of the Invasive Siam Weed, Chromolaena odorata L. (Asteraceae) in the Management of the Major Pests of Cabbage and their Natural Enemies in Southern Ghana

Ezena GN1, Akotsen-Mensah C1,2* and Fening KO1,3

1African Regional Postgraduate Programme in Insect Science, PMB L59, University of Ghana, Legon, Ghana

2Forest and Horticultural Crops Research Centre, University of Ghana, Kade, Ghana

3Soil and Irrigation Research Centre, University of Ghana, Kpong, Ghana

Corresponding Author:
Godfred Nwosu Ezena
Ghana Ministry of Food and Agriculture
PO Box 43, Bawku, Bawku-Zebilla Road, Ghana
Tel: 011233266514910
E-mail: [email protected] (or) [email protected]

Received date: June 29, 2016; Accepted date: July 20, 2016; Published date: July 21, 2016

Citation: Ezena GN, Akotsen-Mensah C, Fening KO (2016) Exploiting the Insecticidal Potential of the Invasive Siam Weed, Chromolaena odorata L. (Asteraceae) in the Management of the Major Pests of Cabbage and their Natural Enemies in Southern Ghana. Adv Crop Sci Tech 4:230. doi:10.4172/2329- 8863.1000230

Copyright: © 2016 Ezena GN, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Cabbage is an important leafy vegetable widely cultivated and consumed in Ghana. It offers a good source of vitamins and minerals to the human body. Despite its importance cabbage production is constrained by insect pests attack. Chemical control has being the main strategy, but without much success, thus the need for alternative options for pest management. Field experiments were conducted in the major and minor rainy seasons of 2014 to evaluate the insecticidal potential of Siam weed, ChromolaenaodorataL. at three concentrations (10, 20 and 30 g/L w/v) in the management of the key pests of cabbage and its effect on their natural enemies. Neem seed extract (50 g/L) and Lambda cyhalothrin (Sunhalothrin® 2.5 ml/L) were used as reference insecticides with tap water as a control. The key pests recorded during the major season were the cabbage aphid, Brevicorynebrassicae, and cabbage webworm, Hellulaundalis, whiles Diamondback moths (DBM), Plutellaxylostellaand B. brassicaewere recorded in the minor season. Generally, the three concentrations of C. odoratawere efficacious in controlling aphids and DBM than the tap water and conventional insecticide, Sunhalothrin® in both the minor and major seasons. However, the 10 and 20 g/L C. odoratarecorded the highest buildup of natural enemy populations and also had higher yield as compared to 30 g/L C. odorata, Sunhalothrin®, and tap water. The cabbage plots sprayed with neem obtained the highest yield

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