Rhizoctonia infection at the bolting and flowering stages of the season can cause roots to pinch off at the crown — which is right around ground level.
Hail on flowering canola
The later hail occurs in the season, the more damage it can do to yield. That said, flowering canola can, with enough time, recover from hail that knocks off a large percentage of flowers.
Sclerotinia: Risk factors and spray timing
If a field has regular rains or high humidity or both from two weeks before flowering and through flowering, then infection will likely occur.
When you see something new
Before spending money on a treatment, growers will need to identify the cause. The Canola Diagnostic Tool can help you work through the possibilities. A few localized tests can also help with the diagnosis….
Sclerotinia stem rot risk: The basics
Earliest canola fields are coming into flower, and many areas of the Prairies have more than enough moisture to elevate the sclerotinia stem rot risk. Here are key risk reminders as we head into sclerotinia stem rot management season: —Prevalence of sclerotinia stem rot has a direct correlation to above-average moisture. If a field has regular rains or high humidity …
Root rot scouting
If you see dying plants or plants with lower leaves dying off while other plants remain green, this may indicate abnormal root function.
Look for blackleg lesions
Blackleg infection prior to the four-leaf stage can result in serious yield loss, but blackleg can be difficult to identify on such small plants.
Spraying for blackleg — The decision
Scouting now for lesions on young canola plants and for pseudothecia on blackleg stubble is one step in blackleg management. Here are factors that increase the blackleg risk….
Novel products: Run your own tests
Rescue treatments for hail, excess moisture and other stress factors are rarely tested in broad scientific studies. Growers considering these treatments have to remember the decision comes down to “buyer beware”.
Damage ID: Cutworms or seedling diseases?
Cutworms and seedling diseases are fairly common causes for toppled or missing plants this time of year. Here are a few tips to help you distinguish which is at work….