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The week after seeding is a good time to verify seeding depth and to check seeds and seedlings for rots and blights. Disease damaged seed and seedlings die quickly, and may be gone within a few days, which is why this timing is important to an accurate diagnosis…
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Here is how to make the flea beetle spray decision…
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Flea beetles are feeding on volunteer and early-seeded canola but their presence does not mean they need to be sprayed…
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Warm weather has meant an earlier emergence of overwintering adult flea beetles. Given that flea beetles will be active when canola emerges, growers will want to pay attention in the few weeks after emergence to see how seed treatment protection holds up and whether additional sprays are warranted…
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1. With phosphorus, ultimately the form you apply is less important than the amount you apply. Crop nutrition specialist Rigas Karamanos used the graph below to show the chronic under-application of P year after year…
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CropLife Canada and the Canadian Honey Council have introduced a smartphone-based app to help facilitate communication between beekeepers, farmers, and sprayer operators…
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Some growers are reporting high numbers of adult flea beetles. Adults emerge from pupae in late July and August and overwinter to feed on young canola seedlings the following spring. These same adults do feed now, but Julie Soroka and Larry Grenkow (Can. J. Plant Sci. 2012: 97-107) found that flea beetle feeding on canola in late-summer is rarely an…
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When doing lygus counts, include adults and late instar nymphs. Nymphs are young lygus, and only the larger nymphs do enough damage to be included in sweep net counts. A key feature is the black dots on the back. Count nymphs with dots. Don’t count them if they’re small and don’t have the dots (like the one above)…
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