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Asian Journal of Agricultural Research
  Year: 2016 | Volume: 10 | Issue: 1 | Page No.: 56-64
DOI: 10.3923/ajar.2016.56.64
 
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Crop and Weed Response to Diuron in the Rain Forest Zone of Ghana

S. Konlan, K. Opoku- Ameyaw, F.K. Oppong, J. Ackornoh and R. Dorgbadji

Abstract:
A series of experiments were carried out to evaluate a residual herbicide containing 800 g kg–1 Diuron present as 3-(3,4-Dichlorophenyl)-1,1-dimethylurea water dispersible granules for weed management in 2012. The experiments assessed the effect of Diuron on selected annual weeds, cowpea and maize when applied pre and post-emergence. The rates of Diuron evaluated ranged from 0-2.0% for potted weeds and trays and 0-4% for phyto-toxicity and field tests. Data taken included damage caused to potted weeds and crops, crop emergence, leaf chlorophyll content, survival and dry matter accumulation of cowpea and maize at 6 weeks after application. The results show that 1% Diuron solution easily controlled the weed species present with the exception of Rottboellia granularis and Commelina diffusa. When applied pre-emergence, Diuron killed all the cowpea and maize plants that emerged within 2 and 3 weeks after sowing, respectively. With the exception of the 4% solution, early post-emergence application was found not to be lethal to cowpea and maize although rates above 2% affected both growth and dry matter accumulation of these crops. It was, therefore, recommended that Diuron at 1.0% solution (2 kg ha–1 in 200 L of water) be used for early post-emergence weed management in cowpea and maize in the forest zone of Ghana and places of similar agro-ecologies.
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How to cite this article:

S. Konlan, K. Opoku- Ameyaw, F.K. Oppong, J. Ackornoh and R. Dorgbadji, 2016. Crop and Weed Response to Diuron in the Rain Forest Zone of Ghana. Asian Journal of Agricultural Research, 10: 56-64.

DOI: 10.3923/ajar.2016.56.64

URL: https://scialert.net/abstract/?doi=ajar.2016.56.64

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