Скачать или смотреть Canola School: Sweep well ahead of deciding to spray for cabbage seed pod weevil

By early July, many canola fields across the Prairies are in the beginning stages of bolting. According to Héctor Cárcamo, research scientist with Agriculture and Agri-Food Canada at Lethbridge, Alta., that's a great time to start thinking about the cabbage seed pod weevil.

Before worrying about thresholds and spray timing for the insect pest that can be quite detrimental to the final yield, it's important to dust off the ol' trusty sweep net, and see what is actually out there.

"Make sure you get inside the field because if you only sweep the edges of the field, you're going to get a very inflated count," explains Cárcamo. "For example, if you just sweep the field in one spot, and you find say four weevils per sweep; the threshold is around three to four weevils. Now, if you move 50 meters into the field, you will find only half as many weevils."

The extra time to get a complete picture of the insect pressure in the field is a small price to pay, compared to the thousands of dollars you might spend spraying fields unnecessarily.

#farming #scouting #insects #pests #canola

Find more episodes of the Canola School at: https://www.realagriculture.com/canol...

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