Home Crop Monitoring Canola School: Controlling grasshoppers, an atypical pest

Canola School: Controlling grasshoppers, an atypical pest

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It’s been dry, windy, and sizzling throughout a lot of the Prairies this yr, and an insect pest that you simply don’t usually see attacking canola is prospering in these situations.

Lyle Jensen, agronomist at AgroPlus, joins Kara Oosterhuis for this Canola College episode the place they talk about grasshopper pressures and choices for management.

“As we’ve basically been in drought conditions here with the heat, grasshoppers have been pretty rapidly expanding their territory out of the ditches and some of the grazing land,” says Jensen. Now that the pest has completed off the extra lush grass within the ditches, they’re shifting into canola, which isn’t a most well-liked meals supply for grasshoppers.

Within the video beneath, you may see {that a} grasshopper will strip a canola plant fully — leaves, lateral stems, and all:

Feeding will largely be on tender, inexperienced components of the plant just like the leaves. Because the leaves are decimated, grasshoppers will go after the pods, inflicting a direct yield loss.

The 2-striped grasshopper will usually feed by taking strips off the pods, in a line, whereas the migratory grasshopper will take a bit.

“The end result is basically the same, it’ll compromise pod integrity and if they’re hungry they’ll eat the seeds right out of the pod,” says Jensen.

The edge to take motion will differ relying on the situation of the crop, says Jensen, and if the injury is extreme alongside edges, it may be price spraying simply the perimeters.

If the inhabitants is all through the sector, at seven to 10 grasshoppers per sq. metre, it’s price spraying the entire area, relying on the yield potential.

Jensen says {that a} Group 28 insecticide utilized to area edges has been efficient at controlling the grasshoppers up to now, and is a bit more efficient on the nymph stage. A Group 1 or Group 3 insecticide is a bit sooner by way of spraying ditches, however doesn’t have a significant residual at controlling grownup grasshoppers which are flushing off of close by grass. A grasshopper bait, equivalent to EcoBran, is one other management possibility, says Jensen.

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