Worms in Canola

Worms in Canola


Worms are starting to show a presence in the canola fields in our area. They were present in over half of the fields I visited today (10/15/12). All the fields with worms were in 4 to 5 leaf canola and none were in the smaller 2 leaf canola (yet). The indications of worm presence was indicated by holes in the leaves as well as “window paneing” (scraping ) of the leaf bottom surface.
The worms are very small at this time. If you see indications you can often “shake” or pat the leaves and then find them curled on the ground beneath the plant. They are a little too small for good identification but looks to be both diamond back larvae and perhaps  beet armyworms.
Common sense should prevail here: a larger more robust plant with moisture can take more worm pressure than a moisture deprived spindly plant. They are eating the leaves not poisoning the plant. However IF the producer has not applied glysophate to the field yet, adding an insecticide to the tank mix would probably be an excellent idea.
Either way, canola is a valuable crop and one should not let the worm population build to the point plant health and thus yield suffers.


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