RESPONSE OF SUGER CANE Saccharum officinarum L. TO THE WEEDS CONTROL BY HERBICIDES AND ITS EFFECT ON GROWTH AND YIELD .

Abstract

One experiment was conducted in the farm of the General Company for sugar in Missan during 2001 to investigate the effects of herbicides on sugar cane Saccharum officinarum L. growth and stems yield and control companion weeds. To control weeds by herbicide was carried out using bentazone, paraquat, fluazifop-butyl, glyphosate, bentazone M. Complete Randomized Block Design was used with the experiment with three replications. The results showed that:- 1. application of paraquat caused a reduction in plant heights, number of green leaves and increases the number of tillers, the number of milling stems and total stems yield. Application of glyphosate or fluazifop-butyl increased the plant heights and stem diameter but reducing the number of green leaves. 2. Application of herbicides such as paraquat or glyphosate or fluazifop- butyl led to lowest weed densities which were 35.6 , 48.6 and 59.3 plant /m2 respectively and achieved greater percentage of weed control represented 58 , 42.7 and 30.1 % respectively