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Lygus feeding at the bud stage is rarely an economic cost — unless the canola is under some other stress, such as drought. Stressed canola may not be able to compensate for lost buds the way a healthy crop can…
Insects
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Young canola plants are vulnerable to numerous stresses, particularly flea beetles, cutworms and seedling diseases. It pays to scout often at this time of the season…
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Scouting for flea beetles at field edges works early in the season when conditions are cool. With warmer weather, flea beetles will have moved throughout canola fields…
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Much of southern and central Alberta and parts of western Saskatchewan still have high levels of lygus bug feeding. Lygus bug numbers are up to 10 times economic control thresholds……
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Issues of the week: July 21, 2010 — Diamondback moth larvae are showing up across the Prairies, and some growers are spraying. Crops just starting to flower should be assessed……
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First signs of diamondback moth larvae are larvae hanging from threads and feeding on leaves. Feeding damage is usually a mining of the leaf, giving the appearance of a “window……
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Issues of the week: July 14, 2010 — Unexplained bud browning and strange plant growth has retailers and growers in the Peace unsure of the problem. Drought stress, nutrient deficiency……
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If a field has cabbage seedpod weevil and diamondback moth feeding, should economic spray thresholds be reduced to account for the combined pressure? In the case of these two species,……
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As bins are prepared for the coming harvest, keep in mind that using malathion on canola seed or in canola storage bins will result in detectable levels of malathion residue……
