MD. ABDULLAH HIL MUNIB1 and M. H. TARIQUE1*
1Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi, Bangladesh. *Corresponding author’s Email: m_hasantarique@yahoo.com
ABSTRACT
The experiment was carried out at Agronomy Field Laboratory, Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi, Bangladesh during the rabi season from December 2012 to March 2013 to study the eco-phenology of weeds and weeding effect on the yield and yield components of wheat. The experiment comprised of two cultivars namely BARI Gom 27 and BARI Gom 23 and four weed control treatments viz. no weeding, one hand weeding, two hand weeding and weed free. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Dominant weed species as found to infest the crop were Cynodon dactylon, Cyperus rotundus, Oxalis corniculata, Sonchus arvensis and Fumaria parviflora. The cultivar BARI Gom 27 produced the highest grain yield and other yield contributing characters than cultivar BARI Gom 23. The highest plant height (95.32 cm), plant weight (11.89g), number of total tillers per plant (5.83), number of fertile tillers per plant(4.53), spike length (10.31 cm), number of spikelets per spike (18.40),number of florets per spikelet (2.92), 1000 grain weight (46.98g), grain yield (4.13 t ha-1), straw yield (6.18 t ha-1) and harvest index (40.29%) were observed in completely weed free condition. On the other hand all these characters that appeared next to the highest were found in two hand weeding treatment. All these yield and yield contributing characters were the lowest in no weeding treatment. The effect of interaction between cultivar and weed control treatments was insignificant for all the yield and yield components.
Keywords: Weed, Weed control, Yield, Wheat and Phenology.