June 28, 2017 – Issue 14

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  • Canola Watch quiz: Herbicide injury

    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?


  • Top 10: canolaPALOOZA 2017 highlights

    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.


  • Sclerotinia stem rot: Dry early, now moist. What’s the risk?

    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.


  • How to count 10-50% flower

    Canola at 20% flower. Source: NDSU

    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.


  • Late June frost: What to do?

    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 insects: Turnip beetle and some Lygaeidae

    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 weevil: Scouting and spray timing

    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.


  • Is a second herbicide application necessary?

    A second in-crop spray only makes sense if…


Canola Watch