Why scout for disease after harvest?
Harvest means the end of the crops, but the job’s not done yet. A thorough field scouting after harvest is important to provide insight into the future wellbeing of your crops.
There are still insects & diseases to inventory. Knowing they’re there when we’re rotating crops & managing fields allows us to understand what potential diseases or problems might have come with the seeds.
Post-harvest scouting avoids missing clues due to a thick crop canopy like canola in mid-season. Also, some diseases come later in the season, after you would scout for diseases.
Some considerations for pests & diseases during post-harvest scouting are:
Sclerotinia spawns late in the season and a fall scout means its already done its damage. However, post-harvest scouting makes it easier to assess the extent of the damage. It provides a better understanding of the disease prevalence and informs decisions on crop rotations.
Infected fields benefit from an extended crop rotation that allows more time for the disease to die off between host crops.
Here are some quick tips for dealing with Sclerotinia:
For more information on how you can combat Sclerotinia, you can visit: www.canolacouncil.org/canola-encyclopedia/diseases/sclerotinia-stem-rot
A canola disease that develops later in the growing season. It can be an issue to scout for but it’s not going to give you an idea of the whole field. Assessing after harvest lets you get a better grasp of problem areas and the reach of the disease.
Here are some quick tips for dealing with Blackleg:
For more information on how you can combat Blackleg, you can visit: www.canolacouncil.org/canola-encyclopedia/disesases/blackleg/#scouting-tips
Farming Smarter is involved with the Alberta Pest Monitoring Program, together we examine the prominence of Wheat Stem Sawfly and Wheat Midge to get a forecast for the following year.
Wheat Midge & Stem Saw Fly can be scouted for at the same time. Stem Saw Fly larvae will cocoon inside 0-2 cm stubble; Wheat Midge larvae is found in soil samples that we send into a lab. Scouting for these pests allows us to plan for future pest management.
If you’re interested in pest scouting at your own farm, here’s what we do when we scout:
Some tips we have for dealing with Wheat Stem Sawfly:
Some tips we have for dealing with Wheat Midge:
Post-harvest scouting of pests can also be beneficial. It shows what insect pressure you have in your crops. If Insects can burrow over winter, it provides insight into what your crops dealt with this season and what you can expect next time.
Here are some management practices that can help you combat pests and diseases at your farm:
For more information, visit: www.alberta.ca/wheat-steam-sawfly-overview.aspx www.alberta.ca/wheat-midge-overview.aspx
Created August 18, 2021 | Category: Agronomy