Home Crop Monitoring Soybean School: Getting ahead when you’re behind on in-crop weed control

Soybean School: Getting ahead when you’re behind on in-crop weed control


A spring of extremes — first chilly, dry and windy, then scorching, dry and windy — has resulted in weeds getting a head begin in lots of soybean fields within the soybean-growing areas of Western Canada.

Whereas wind and chilly temperatures delayed burnoff functions at the beginning of the season, questions on when to spray in excessive, scorching circumstances have grow to be widespread with the arrival of a serious warmth wave during the last week.

“The heat of the day is challenging, as if you’re up over 28 degrees you can get additional crop injury and plants start to shut down,” explains Harold Brown, technical service specialist with BASF in jap Manitoba, on this weed control-themed Soybean Faculty episode.

From a temperature perspective, early morning and late night are often extra excellent than the warmth of the day. However when we’re speaking about managing hard-to-control weeds in soybeans, similar to glyphosate-resistant kochia, the dialog typically entails dicamba, and dicamba is prone to drift resulting from inversions.

“We’re saying don’t spray in the heat of the day, so maybe in the cooler parts of the evening or early morning, although you can have some challenges with inversions, so there’s not a simple answer,” notes Brown. “Maybe the best thing is to delay spraying if the weeds are really small until after this hot weather has gone by.”

Brown discusses the method of deciding when to spray amidst difficult climate with oncoming weeds, crop staging, and extra on this Soybean Faculty episode:


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