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…
Canola Watch Posts
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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…
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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…
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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…
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We’ve had reports this week of growers causing unexpected damage to canola because the sprayer was not cleaned properly. The ideal tank cleaner has a detergent, a surfactant and a component to increase pH (i.e. ammonia) in one formulation. The detergent will cut any oils or fats found in current adjuvants, the pH increaser solubilizes the Group 2 herbicides and…
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Growers with high risk conditions for sclerotinia stem rot may want to get their management plan in place. Booking fungicide may be worthwhile if you have a preferred product. This is pre-planning only. Fungicide applications must target flowers to be effective, so do not spray until a field reaches at least 20% flowering…
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Flea beetles are worse that usual in some areas, with growers spraying more than once and with heavy feeding carrying on past the 4-leaf stage. Cutworm losses are low in general but flaring up in some areas. Aster leafhoppers are at much lower numbers than last year and the aster yellows threat is minimal based on what we know at…
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