Seed first or spray weeds?
Juggling seeding and effective weed control is challenging. Where possible, opt for a pre-seed rather than pre-emergence burndown because:
- poor spraying conditions and the busyness of seeding may squeeze (or close) the very small pre-emergence application window;
- weeds in dry regions are likely to be dusty after seeding, decreasing herbicide efficacy;
- later control allows weeds more time to steal moisture in dry conditions; and
- a number of tank mix partners allowable at pre-seed timing cannot be applied at pre-emergence.
In ideal conditions, canola can emerge in as little as four days. If considering post-seeding, pre-emergence herbicide, assess germination carefully across all growing zones of the field to avoid the risk of killing seedlings.
Regardless of application timing, always scout to determine target weed species, and always tank mix for effective control. (Can I spray at night?) (Best tips for weed management) (See weeds spray them)
