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South winds from Texas and California/Mexico have reached the Prairies, as the maps show. Winds from the south central U.S. bring aster leafhoppers (which carries aster yellows phytoplasma) and the California winds can bring diamondback moths…
Insects other
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Wireworms have not become the crisis some expected after lindane was pulled from the market, but some fields do have populations at levels that may cause economic loss. Noticeable losses are often confined to small bare patches. Check bare patches to confirm the reason for missing plants. It could be cutworms, wireworms, disease or something else entirely — like Richardson… -
Delayed arrival of southerly winds in 2013, together with the colder start to the growing season, may lessen the risks associated with aster leafhoppers, the insect (shown) that carries aster yellows phytoplasma. However, given that we're still learning about this disease, it will be difficult to predict disease levels at this stage of the season… -
Give the brand new online Canola Diagnostic Tool a pre-season test drive at www.canoladiagnostictool.ca. Start with a problem scenario that you encountered in a canola field in 2012, and work through the tool to see what potential causes it provides. Read the cause descriptions and “ways to confirm” to determine which cause is most likely…
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Insect economic thresholds represent the break even point for an insecticide spray. Sticking to thresholds will also help preserve a vibrant and economically valuable population of beneficial insects that can naturally keep pest insect populations in the check. This article provides thresholds for all major canola insect pests… -
This calendar shows you the major pests and problems to look for in canola at each point in the season… -
Growers who do not have the time for timely scouting may want to hire an agronomist to support their own scouting program. Most agronomists are also pressed for time, and may not be able to spend one to 2 hours a week scouting each canola field, but agronomists can supplement the time growers spend scouting, and provide experience and skills… -
Some fields may have a variety of green worms feeding, including bertha armyworm, diamondback moth larvae, imported cabbageworm and alfalfa looper. Here's how to tell them apart… -
We don’t have scientific evidence to combine thresholds, but where an “additive” effect of multiple species can make sense is when more than one species are feeding on key yield-producing areas — flowers, buds or pods — at the same time…
