Greener Journal of Agricultural Sciences

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Akinola and Salami

Greener Journal of Agricultural Sciences, Vol. 6 (1), pp. 028-040, January 2016.

ISSN: 2276-7770 © 2016 Greener Journals

Research Paper

Manuscript Number: 111215158

 

(DOI http://doi.org/10.15580/GJAS.2016.1.111215158)

 

Effect of Herbicides Application on the Management of Tithonia in Maize (Zea mays)

 

Akinola B.A.1* and Salami A.E.


1Department of Crop Soil and Environmental Sciences, Ekiti State University Ado-Ekiti, P.O. Box 854, Akure, Nigeria.


Abstract

 

The influence of three types of herbicide mixtures (atrazine at 2 kg a.i./ha, paraquat at 2 litres (0.5 kg) ai/ha and their mixture) applied either at planting or 2 weeks after planting (WAP), were evaluated for Tithonia management. The experiments were conducted at the Teaching and Research Farm, Ekiti State University, Ado-Ekiti, Nigeria (April-September, 2009 and May-August 2010). Teaching and Research Farm, Federal College of Agriculture, Akure, Nigeria (May-August 2010) and Agricultural Machines and Machinery Training Centre, Akure, Nigeria (July-October, 2009).The experiments were laid down in a split plot design and replicated three times to give 18 experimental units. Data collected on growth parameters and yield of maize as well as Tithonia density and biomass were subjected to ANOVA and means separated by DMRT Atrazine and resulted in significantly higher yields of 2.54 relative to the mixture of atrazine and paraquat and paraquat which had 2.44 and 0.71 t/ha respectively. The highest gross margin (GM) of N149, 200.00 was obtained from the application of atrazine at 2 WAP. The highest Marginal Rate of Returns of 2.81 was obtained from the application of atrazine at 2 WAP. The relative abundance of Tithonia at 8-12 WAP was between 96.8 and 99.5% and this indicates that the plant could be a dominant weed in a farmland.

 

Key words: ANOVA, herbicide, maize, gross margin.


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