Home Crop Monitoring Wheat School: Identifying the flag leaf

Wheat School: Identifying the flag leaf

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With winter wheat progressing quickly by means of its progress phases in Ontario, RealAgriculture agronomist Peter Johnson is advising growers to maintain an in depth eye on the crop.

With crop growth working 10 days forward of schedule, Johnson says wheat fields have to be scouted to make important administration selections to optimize yield. On this episode of the Wheat College, he heads to the discipline to exhibit how growers can determine the penultimate leaf and flag leaf, and successfully time weed management and nitrogen and fungicide functions.

Johnson notes that growers have to be cautious to not burn the penultimate leaf if they’re planning a final nitrogen software earlier than the flag leaf emerges. Flag leaf emergence is a sign to stop making use of weed management. “It’s just too high risk,” he provides.

It’s additionally vital for growers to scout and look down into the cover to determine any illness which may be current.

“If you have powdery mildew and septoria, we need to keep the penultimate leaf and the flag leaf clean,” says Johnson. “Remember fungicides don’t have good mobility in the plant so when the penultimate leaf is fully out and we see the flag leaf starting to spike — that’s the perfect timing for that first fungicide application if it has not been applied with the weed control.”

With all the things underneath management in the cover, growers are then well-positioned to guard the flag leaf with a T3 fungicide. (See video under.)

Click on right here for extra Wheat College episodes.

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