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Cutting canola in hot conditions will lead to rapid dry down and desiccation. Chlorophyll may not have time to clear from immature seed, which locks in high green counts. If growers feel they must swath, wait until temperatures cool down in the evening and then swath at night to take advantage of those cooler temperatures and any moisture from dew…
Canola Watch Posts
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Don’t let your guard down just yet. Berthas have been at thresholds in east central Alberta and western Saskatchewan fields in the past week. Some fields probably should be sprayed, as long as they’re more than 7 days from swathing. Scout in the heat of day… -
Clubroot damaged canola plants have been spotted in a few new regions of Alberta this fall. Clubroot infected canola will often ripen prematurely. For this reason, clubroot infection is often confused with heat stress or other diseases such as sclerotinia, fusarium wilt or blackleg. Proper diagnosis of clubroot should always include digging up plants to check for gall formation on… -
Alternaria has infected the pods of many hailed crops. Keep watching these crops. When infected areas make up 50% or more of the crop, swathing early may be the best way to salvage the yield in those infected plants if a large proportion of pod surfaces are covered with the black spots. Read more to see photos of alternaria infection… -
Canola combined in hot temperatures needs to go on aeration immediately, even if the canola is dry. Canola isn’t safe at high temperatures, especially if green seed counts are elevated or if there is dockage in the sample…
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High temperatures (as high as mid 30’s in some areas) are occurring across the Prairies as swathing timing nears. Swathing under such hot conditions can result in rapid dry down (moisture loss) but longer curing (time for green seeds to clear chlorophyll). Swath as close to 60% seed colour change (SCC) as is practical under these hot conditions and do…
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Peace: Warm temperatures last week and over the weekend were welcomed for crop development. The crop is progressing well but still about 10 days behind. Some fields are at late pod with some early swathing started. Swathing will become more general in about 10 days to two weeks. There is a fair amount of the canola acreage that will not…
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Swathing early before the recommended 50 to 60% seed colour change in the high temperatures occurring lately will not necessarily mean earlier combining. Under hot, dry conditions crop dry down can occur quickly (drop below 10% moisture) but not crop curing (seed maturation and removal of chlorophyll). Fields that are swathed early (e.g. 20 or 30% seed colour change) and/or…
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Lygus populations continue to be high and exceed thresholds in parts of Alberta and Manitoba (around Morris and Altona). Once pods become leathery (role of thumb is about two weeks before swathing), then even adult lygus cannot cause damage and control is not economical. Economic control thresholds for lygus bugs are based on adult and late instar counts. When canola…
