Planting is complete in most areas. April planted canola is at 2-4 leaf stage and advancing rapidly. Plant populations are fair to average (4-8 plants/ft2) with some replanting due to weather related stress and flea beetles. Flea beetle pressure is high in most areas. Sprays have no residual control so scout several days later to evaluate flea beetle populations. Populations are highest in field borders. Scout up to 4 leaf stage. Threshold for control is 25% leaf feeding. Critical weed control period is 1-4 leaf stage but schedule weed control at early stages. Weeds that emerge with canola cause greatest yield reductions. Take time to clean spray tanks thoroughly before applying post-emergent, as canola is quite sensitive to many herbicide.
Written by Brian Hall
Former Canola and Edible Bean Specialist (retired)