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ReserarchID
PX574
Background: Application of chemicals for the control of Helicoverpa armigera and Diparopsis castanea is based on egg threshold, while for Erias insulana and E. biplaga larval counts are used. In Zimbabwe the traditional farmer practice involves use of weekly spraying, fortnightly spraying and spraying at first sight of damaged squares. The methods may be less effective, costly, damaging to the environment and labour intensive. Experiments were conducted for three consecutive seasons from 2010/11 season up to 2012/13 season to evaluate the spray timing methods. Spraying at bollworm egg threshold level was the standard. The trial was laid as a randomised complete block design replicated four times at Cotton Research Institute, Dande and Umguza.
Mapuranga Rangarirai. 2017. \u201cEffectiveness of Different Spay Timing Methods for the Control of Lepidopteron Pests in Cotton\u201d. Global Journal of Science Frontier Research - D: Agriculture & Veterinary GJSFR-D Volume 16 (GJSFR Volume 16 Issue D8): .
Crossref Journal DOI 10.17406/GJSFR
Print ISSN 0975-5896
e-ISSN 2249-4626
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Total Score: 103
Country: Zimbabwe
Subject: Global Journal of Science Frontier Research - D: Agriculture & Veterinary
Authors: Mapuranga Rangarirai, Jimu Francis, Mubvekeri Washington (PhD/Dr. count: 0)
View Count (all-time): 108
Total Views (Real + Logic): 3507
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Publish Date: 2017 02, Sun
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Background: Application of chemicals for the control of Helicoverpa armigera and Diparopsis castanea is based on egg threshold, while for Erias insulana and E. biplaga larval counts are used. In Zimbabwe the traditional farmer practice involves use of weekly spraying, fortnightly spraying and spraying at first sight of damaged squares. The methods may be less effective, costly, damaging to the environment and labour intensive. Experiments were conducted for three consecutive seasons from 2010/11 season up to 2012/13 season to evaluate the spray timing methods. Spraying at bollworm egg threshold level was the standard. The trial was laid as a randomised complete block design replicated four times at Cotton Research Institute, Dande and Umguza.
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