Canola Digest Science 2014 Issue
Science

Protect canola from early insect feeding

Key practice: Use seed treatments and early in-crop treatments, if scouting deems them necessary, to protect young plants from flea beetles. Key research: Hallett, Rebecca, University of Guelph. “Assessing the Impact of Swede Midge on Canola Production in the Prairies & Ontario.” Canola Agronomic Research Program (CARP 2005-14). Olfert, Owen and Elliott, Bob, Agriculture and...
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Science

Follow insect thresholds

Key practice: Follow insect thresholds to manage input costs against potential yield response. Conserve and protect natural enemies and beneficial insects by using economic thresholds to determine the need and timing for insecticidal controls. Key research: Bracken, G.K. and Bucher, G.E. “An Estimate of the Relation Between Density of Bertha Armyworm and Yield Loss on...
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Science

Apply enough nitrogen

Key practice: Use soil tests, ideally taken at consistent locations (GPS helps), and base rate decisions on soil test recommendations. Key research: S.A. Brandt, Agriculture and Agri-Food Canada (AAFC), et al.“Seeding rate, fertilizer level and disease management effects on hybrid versus open pollinated canola (Brassica napus L.)” Canadian Journal of Plant Science, 2007. R.E. Blackshaw,...
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Science

Canola needs sulphur fertilizer

Canola growers can experience substantial decreases in yield due to sulphur deficiency. The abstract to the Grant, Malhi and Karamanos review cited above begins with this: “(Canola) has a high concentration of sulphur in its tissue and seed and a particularly high demand for sulphur relative to its yield potential. Therefore, effective sulphur management is...
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Science

Improve nitrogen use efficiency

Improved nitrogen use efficiency could provide a significant economic gain, given that nitrogen is one of canola growers’ single biggest input costs. “Nutrient use efficiency from fertilizer application is generally less than 50 percent in the year it is applied. Improvements in nutrient use efficiency are therefore critical, both to improve the economics of crop...
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