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The action threshold for flea beetles in canola crops in Canada is an average leaf area loss of 25 per cent or more. How do you make that assessment?…
Flea beetle
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from the perspectives of herbicide uptake, efficacy and label requirements, night spraying is OK as long as weeds are not under any stress and are growing actively going into the evening… -
Four questions that will help with your approach to flea beetle scouting and risk assessment… -
Cutworm feeding results in notched, wilted, dead or cut-off plants. Patches of missing plants could also be cutworms. Include cutworms on the scouting checklist for the first one to three weeks after emergence… -
Jim Tansey and Keith Gabert talk about flea beetles – including how far they travel to find the first canola crops, major differences between striped and crucifer species, and how long the risk can last…
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Striped flea beetles tend to emerge earlier than crucifer flea beetles, and some are already feeding on canola volunteers. Are first-emerging crops at higher risk?… -
As predicted by moth traps, the Peace region has fields at thresholds. Beyond there, a few field here and there across the Prairies have been sprayed but the worm is not a problem on most fields… -
The flea beetle situation seems worse than usual. The simplest reason seems the most logical: Warm and dry weather favours flea beetle emergence and activity. The same dry weather slows crop growth, leaving plants at a vulnerable small size for longer… -
While only a small percentage of canola fields tend to require foliar insecticides to manage flea beetles in addition to seed treatment, all fields should be monitored to assess the potential threat. Begin monitoring right after emergence and through until at least the four-leaf stage…
