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CRITICAL DURATION IN WEEDS CONTROL OF WHEAT | ||
| Euphrates Journal of Agriculture Science | ||
| Article 1, Volume 7, Issue 1, 2015, Pages 143-151 | ||
| Abstract | ||
| ABSTRACT : A field two trial was carried out at College of agriculture Baghdad University, Abu- Ghraib during the winter season of 2012-2013 to investigate herbicides uses at last growth stage in decrase number and dray weight of weeds.Two experiment each one included five treatmeant (Pallas و Granstar, Harmony, Lancelot and weedy). The characterstics Studied of narrow - leaved weeds number, broad- leaved weeds number, total dray weight of weeds and grain yield for wheat of IBA-99 cultiver. The design used was RCBD three replicates. The results indicated that the herbicide Pallas was superior in the first experiment (ZGS 13-14) compared with other treatment in giving the highest reduced of narrow - leaved weeds number, broad- leaved weeds number, total dray weight of weeds values 20.33 plant.m-2, 3.32 plant.m-2 and 33.00 gm.m-2 ,respectively. The herbicide Pallas giving the highest of grain yield values 3847 kg.h-1. In the second experiment(ZGS 22), there were no significant differences between the treatments of all herbicides compared with weedy. We conclude from the study that weed control process in the second experiment came at the wrong time (late), Here we must point out that weed control processes must be carried out in accordance with the timings recommended and considered this a critical timings, The addition of any herbicides used in the experiments must be performed at the 3-4 leaf stage. Spraying herbicides processes late will leads to the lack of herbicides effect in weeds growth, number and dray weight of weeds, which is reflected later in reducing grain yield. Keywords: Wheat weed,Herbicides, Broad-leaved weeds and narrow-leaved weeds. | ||
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