Please use this identifier to cite or link to this item: https://cris.library.msu.ac.zw//handle/11408/324
Title: A preliminary evaluation of chloro-nicotinyl aphicides as planting-hole treatments against the tobacco aphid Myzus persicae nicotianae
Authors: Matanhire, Rutendo
Keywords: Soil applications
Issue Date: 2013
Publisher: Midlands State University
Abstract: A field trial was done to examine the efficacy of chloro-nicotinyl aphicides applied as soil applications, and to determine the optimum rate for fipronil, acetamiprid and calypso for control of the tobacco aphid Myzus persicae. The tobacco variety KRK26 was used in this experiment. The plants were initially exposed to natural infestation by the tobacco aphid. At eight weeks after planting (WAP) the plants were artificially infested with cultured aphids after an assessment of natural infestation was done. Assessments were done at weekly intervals up to 11WAP. The aphicides thiamethaxom, imidacloprid 350 SC and fipronil at a rate of 500 ml.Ha-1 exhibited efficacies against the aphids comparable to the two standard aphicides actara and confidor. The aphicide thiamethaxom had the highest residual activity as it was able to effectively control aphids even up to the last assessment week (11 WAP), followed by fipronil and then imidacloprid. This indicates that these three aphicides could potentially be used as soil applications to effectively control M. persicae. In contrast, the rest of the treatments showed little or no efficacy against the tobacco aphid. The suitable application rates for the efficacious chemicals were125 ml.100-1 for thiamethaxom, 170 ml.100L-1 for imidacloprid 350 SC and 500 ml.Ha-1 for fipronil.
URI: http://hdl.handle.net/11408/324
Appears in Collections:Bsc Biological Sciences Honours Degree

Files in This Item:
File Description SizeFormat 
rutendo_final dessertation__24 May.pdf1.17 MBAdobe PDFThumbnail
View/Open
Show full item record

Page view(s)

22
checked on Jul 23, 2024

Download(s)

6
checked on Jul 23, 2024

Google ScholarTM

Check


Items in MSUIR are protected by copyright, with all rights reserved, unless otherwise indicated.