Home / Canola Watch / Page 236
-
Many canola fields have a combination of insects feeding on the crop. An “additive” effect is possible when more than one species are feeding on key yield-producing areas — flowers, buds or pods — at the same time. For example, lygus and cabbage seedpod weevil have been found in the same fields in the southern Prairies this week. Preliminary results…
-
Leafhopper populations are building, which could increase the risk for aster yellows. Even so, there is not really a good case for spraying for leafhoppers in canola. Why not?…
-
The ideal time for a sulphur top up is any time before flowering, but a top up at early flowering may pay off if plants are showing signs of sulphur deficiency. The ideal time for a nitrogen top up is before the 5-leaf stage of canola, but AAFC research out of Indian Head, Saskatchewan, shows that nitrogen top dress as…
-
Three of the top 10 have to do with moisture, the key risk factor for sclerotinia stem rot…
-
Cabbage seedpod weevil numbers are high in some regions of southern Alberta and southwestern Saskatchewan. Growers and agronomists are encouraged to scout canola fields, and follow these management decision-making guidelines:……
-
With rainfall general across the Prairies — excessive in certain areas — and with flowering just around the corner, the sclerotinia stem rot risk is building. Assess the situation field by field to see which may warrant a protective fungicide. Excessive moisture can cause leaching of nitrogen and sulphur. Assess yield potential and root depth to see whether a top…
-
1. Have a plan to manage clubroot. Don't wait until clubroot manages you. Whether you're a farmer, agronomist, county/municipal staff, extension, or from the oil & gas industry, you need a clubroot management plan. A plan should include answers to the following: How will you quarantine a field? How will you plan your field work? When will you sanitize your…
-
Wet soils cause an oxygen deficiency, which reduces root respiration and growth. Root failure reduces nutrient uptake, and plants will eventually die unless drowned areas dry out quickly. A few days in waterlogged soil can be enough to kill canola plants, and yield loss is certain — although as canola plants age, they tend to be more resilient…
-
Growers can expect to see some nitrogen loss from extended heavy rains, probably in the range of 20-50%. Before top dressing, wait to see how the crop recovers from saturated soils before investing any more in fertilizer. Don’t do anything while soils are still wet — roots cannot take up nutrient when soils are saturated. Applying nutrient direct to leaves…
Return to Canola Council Home
