June 6, 2012 – Issue 15

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  • Issues of the week

    2012 is a bad year for flea beetles. The flea beetle threat continues all across the Prairies. Seed treatments for canola seeded in late April or early May will be losing effectiveness by now, and foliar applications will be necessary in those fields where feeding has reached an average of 25% defoliation and flea beetles […]


  • Photo quiz of the week

    What caused these bent hypocotyls? Click Read More to make your answer.


  • Grassy weeds advancing

    LL: Use high water volumes for Liberty and use the Group 1 tank mix. RR: Use the 180 ae rate of glyphosate if you plant to hit grassy weeds first and follow up later. CL: Consider Odyssey DLX for enhanced grassy weed control in Clearfield canola.


  • How to make the flea beetle spray decision

    Striped flea beetles. Credit: Denis Pageau, AAFC

    If newest leaves are 25% defoliated and flea beetles continue to feed, then spraying is probably warranted. If newest leaves are growing fast and virtually untouched, spraying is probably not necessary — even if the cotyledons sustained heavy damage. This crop will likely outgrow the threat.


  • How to ID insects by feeding damage

    Diamondback moth and flea beetle damage can look similar in some cases. So can wireworm and cutworm underground feeding. Look for the damage and the insects before making a final spray decision.


  • Tank mixing herbicide with fungicide or insecticide

    If an insect or disease threat is present at economic thresholds and within the weed control window, applying herbicides with other pest control products can add to production efficiency and cost management. Before mixing, make sure all products are compatible. And if they are compatible, they may have strict rules for mixing order.


  • How to leave a check strip

    Keep it simple — compare only treated and untreated strips. Mark the strips and take them to yield. Do an economic analysis. Work with other agronomists and other growers and compare results.


  • Crusting: Rain is the only practical solution

    No research has been conducted to show reliable ways to break up crusting and free the crop. If a few plants have emerged, it may be best to leave them be. One to 2 plants per square foot are better than none.


  • Tips for spraying in wind

    Fine sprays may provide better leaf coverage, but spraying weeds early is more important than getting good coverage of the leaf. Coarse nozzles, low boom heights and appropriate water volumes are key.


  • Coming Events

    Alberta Farming Smarter insect crop walk,  Thursday, June 7 in Lethhbridge. Canola Crop Walk, Wednesday, June 13 in Lethbridge Controlled Traffic Farming Crop Walk with Robert Ruwoldt, Thursday, June 14 in Rolling Hills.


Canola Watch