Hoeing and weeding
The crop should be kept clean of weeds. First hoeing may be done three weeks after sowing and the second a month thereafter. The crop may be lightly earthed to save it from lodging. Use of Basalin at the rate of 1 kg a.i. per hectare in 800-1000 L water as preplanting spray has been found effective in controlling weeds in sunflower crop.