Journal of Pure and Applied MicrobiologyVol. 2 No. 1

Influence of Temperature on Maize Tolerance to Alachlor, Metazachlor and Metolachlor

L. Kanyomeka¹* and C.F. Reinhardt²

¹Department of Crop Science, Faculty of Agriculture and Natural Resources, University of Namibia, Private Bag 5520, Oshakati, Namibia. ²Department of Plant Production and Soil Science, Faculty of Biological and Agricultural Sciences, University of Pretoria, 0002, Pretoria, South Africa.

Received on 26 January 2008 and accepted on 07 March 2008

 

ABSTRACT

Temperature affects the performances of herbicides in general. A study was conducted to determine the influence of temperature on the tolerance of maize genotypes to alachlor, metazachlor and metolachlor. Experiments were conducted in growth chambers at the University of Pretoria experimental farm. Results showed significant influence of temperature on maize tolerance to all the herbicides. Low temperatures significantly reduced the growth of maize plants. Metazachlor performance was most influenced by temperature, indicating that temperature influence on maize tolerance to herbicides is herbicide-dependent. This necessitates the need to screen maize genotypes for tolerance to herbicides under varying temperatures. Genotypes that are tolerant to commonly used herbicides under varying temperatures could be recommended for areas where temperatures fluctuate a lot.

Keywords : Maize genotypes, maize herbicides tolerance, visual injury, shoot dry mass.