Weeds may reduce yield and quality of the crop. Farmers have a number of tools available to control weeds. They should try and utilize as many tools as possible to manage weeds.
Broadleaf management strategies that should be considered include increasing seeding rates, using weed control (tillage or herbicide) prior to seeding and varying seeding dates. There are also a number of herbicides available for weed control.
Herbicides containing 2,4-D should be avoided on oats as it has been shown to cause considerable yield reduction. Products containing dicamba should be used according to the stage restrictions on the label. Application of dicamba products under stress conditions should be avoided.
Links to provincial recommendations:
Grassy weed management strategies are much more difficult. Growers should be considered include increasing seeding rates, using weed control (tillage or herbicide) prior to seeding and varying seeding dates. There are a limited number of herbicides registered to control grassy weeds. Lorox/linuron are registered for controlling barnyard grass and suppression of green foxtail.
There are a number of strategies used to deal with wild oats. They include:
- Growing on fields with low wild oat populations
- Delaying seeding until wild oats have emerged and controlling through cultivation or herbicide burnoff
- Using tillage or herbicides just before emergence of the oats to control emerged wild oats
- Increasing plant populations by seeding heavy in order to have a competitive crop
- Applying fertilizer in precision bands adjacent to the seedrow in order to make the crop as competitive as possible.
- Growing most competitive variety of oats.
- Wild oat populations can be reduced in preceding crops by using effective control measures or growing a perennial forage crop for a number of years prior to breaking and planting the oat crop.