Forest Sciences Commons^™

Critical Period Of Weed Control In Three Winter Oilseed Rape (Brassica Napus L.) Cultivars, Javad Hamzei, A. Dabbagh Mohammady Nasab, Farrokh Rahmizadeh Khoie, Aziz Javanshir, Mohammad Moghaddam

Turkish Journal of Agriculture and Forestry

Field experiments were carried out at the Agricultural Research Station, Faculty of Agriculture, University of Tabriz, in 2004-2005 and 2005-2006. Three winter oilseed rape cultivars (Okapi, Licord, and SLM046) with 12 weed interference durations were evaluated in a factorial experiment based on a randomized complete block design with 3 replications. The experiments consisted of 2 sets of treatments. In the first set, the crop was kept weed-free until the growth stages of 4-leaf, 8-leaf, stem elongation, flowering, and podding. In the second set, weeds were permitted to grow within the crop until the above-mentioned growth stages. Weedy and weed-free checks …