You have to scout to know what’s going on in the fields. Here are 10 things to look for this week. 10 – Gopher damage (Richardson ground squirrels or pocket gophers) Read more. 9 – Environmental damage – frost or wind 8 – Wild buckwheat. Read more. 7 – Herbicide efficacy. Is weed control what you expected? If not, why…
Canola Watch Posts
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Cutworms are spotty but keep scouting. Flea beetles may need to be controlled past the 4-leaf stage in some extreme cases this year. Cabbage seedpod weevil numbers are building but only spray after first flower and only if sweep net results show them at thresholds. Hold off on early grasshopper control…
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Bees are good for canola. Canola is good for bees. Canola flowers provide an important source of nectar for honey producers in Western Canada: 80% of the honey produced in Canada comes from canola flowers. Honey bees and other pollinators can also increase canola yields. Although napus canola is self-pollinating, studies show that the extra level of pollination that bees…
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Aster leafhopper numbers are quite low so far this year, down considerably from 2012. Aster leafhoppers carry aster yellows phytoplasma, so without leafhoppers to transfer the disease, there is no infection. Based on what we know at this stage, there is no evidence of a significant aster yellows risk for 2013…
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Growers who used elemental sulphur as their only sulphur source may see deficiencies in this year’s crop. Elemental sulphur will not be available when the crop needs it. In following the 4-Rs of fertilizer, elemental sulphur applied at seeding is not the “right source” or the “right time.” Sulphur deficiency symptoms (see the photos) that appear at the bud to…
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Nutrient and fungicide top dress treatments have been promoted to help heal and restart canola after hail. We don’t have published studies on using these or any treatments for this purpose in Western Canada, so it’s buyer beware. Leave a check strip to see if they improved yield. For products that require foliar uptake to work properly, severe hail damage…
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Read more for crop walks and diagnostic schools in July…
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Canola crops across the Prairies look very good, in general, and growers are optimistic at this stage of the season. Top-dress fertilizer is a hot topic this week. The most efficient way to apply fertilizer on the Prairies is during the seeding pass, but some circumstances do call for top up nitrogen or sulphur for canola. Seedling diseases such as…