Rotating Canola Genetics to Combat Blackleg
Blackleg is a major disease that affects canola crops. It can cause significant yield losses if not managed properly. Blackleg can reduce canola yields by up to 50% in severe cases. This disease not only affects the current crop but the infected residue can impact future crops. The economic impact can be substantial, leading to reduced profitability for farmers.
Blackleg is widespread across Western Canada. The disease has become more prevalent due to tight crop rotations and the repeated use of the same canola varieties. Both these practices can lead to the breakdown of genetic resistance that protects the plant from blackleg.
Many producers are not fully aware of the specific blackleg strain present in their fields on in the varieties they plant.
Solutions:
1. Rotate Canola Varieties by Company:
If you used BASF Invigor hybrids last season, consider planting other company hybrids this season – Dekalb, Brett Young, Canterra. Different blackleg genetics are used by each company. Rotating genetics will slow the blackleg strains resistance.
2. Avoid Repeating Varieties:
If you prefer to stay with the same company, ensure that the variety you plant on each field is not the same as the variety you planted 2 years ago. This helps maintain the effectiveness of the genetic resistance.
3. Increase Rotation Intervals:
Increase the rotation interval of canola from once every two years to once every three or four years. This reduces the disease pressure on the crop and allows for the infected residue to breakdown.
4. Conduct Blackleg Tests:
Perform blackleg tests on your fields to determine the specific strain of the disease present. This information allows you to choose the most effective variety to target the strain.
By following these recommendations, you can effectively manage blackleg in your canola crops, ensuring healthier plants and better yields. Remember, rotating your canola genetics is a key strategy in maintaining the long-term health and productivity of your fields.