Return to Canola Council Home
Regrowth after hail may extend the flowering period, which also increases the sclerotinia stem rot risk. If yield potential is still high and if conditions favorable to sclerotinia stem rot persist, then a fungicide spray may pay off…
Canola Watch Posts
-
-
Even if it doesn’t rain during flowering, high humidity can promote apothecia to release sclerotinia ascospores. Consider that when using the checklist to calculate your sclerotinia stem rot risk… -
A crop needs 40 to 60 frost free days after the start of flowering to reach maturity. That takes us to late August or early September if the crop is flowering today. If a late crop is still two or three weeks from flowering, it is already at high risk of fall frost damage which could negate any economic benefit…
-
Cabbage seedpod weevil adults have arrived and are feeding on volunteer canola at the bloom stage in southern Alberta and southwest Saskatchewan. Weevils move to canola fields at the bud to early flower stages. Growers should start scouting…
-
Volunteer canola that is done flowering will have already produced a large amount of viable seed. Unfortunately, controlling plants at this stage of growth will do little to reduce the viability of those seeds…
-
Many canola fields are under stress from excess water. A fertilizer top up may help, but hold off until the ground dries up and the crop starts actively growing again……
-
Peace (B.C. and Alberta): South and central Peace regions got a lot of rain in the past week, with accumulations of 4” to 7”. Canola in low areas is yellowing……
-
Herbicide labels say that glyphosate and Odyssey cannot be applied to canola after the 6-leaf stage and Liberty cannot be applied after early bolting. These limits are in place to ensure effective product performance and crop safety. Later applications can lead to reduced weed control due to advanced weed staging and reduced herbicide contact with the weeds through the increased…
-
If fields are moist at the time of flowering, and canola has good yield potential (e.g. 30 bu./ac. or more), then it will probably pay to spray a fungicide to limit sclerotinia losses. Here are a few important questions about the disease:…