If canola plants start to look funny after herbicide spray season, it could be that residues were stripped from the sprayer tank and plumbing, or that spray drifted in from another field. The following images show typical symptoms of foliar herbicide mishaps. Can you name the herbicide group that caused the damage?
Attendees at canolaPALOOZA in Saskatoon, Portage la Prairie and Lacombe could write their own Top 10s and come up with completely different lists from ours. This is ours.
If conditions were dry, then turned wet, the sclerotinia risk depends on when this transition occurred.
Early dry weather doesn’t matter as much as long as you have moisture within the canopy leading up to and during the flowering period.
As a rough estimate, the 20% flower or “bloom” stage is when the main stem has around 15 “flowers”. Canola can reach 20% bloom in 4-5 days after first flower.
Parts of Saskatchewan had frost this week! The message for a late June frost would be similar to a frost early in the spring: Wait to assess crop regrowth, and hope that at least one plant per square foot survives. The key difference is that by late June reseeding really isn’t an option.
Red turnip beetles are eating large patches in a few fields in central Alberta. Red turnip beetles eat plants from the brassica family only, and they are sometimes — though rarely — an economic pest in canola.
Cabbage seedpod weevils move to canola fields at the bud to early-flower stages. While they will feed on buds and destroy some of them, spraying is rarely recommended before 10% bloom.
A second in-crop spray only makes sense… …If growers use canola as a clean-up crop for Group-1 resistant wild oats, narrow-leaved hawk’s beard, round-leaved mallow and other tough weeds, a second herbicide application may be required to do the job. …If weeds are plentiful, at the same stage or ahead of the crop and the […]