Home Crop Monitoring Corn School: Weather stress can fuel northern corn leaf blight

Corn School: Weather stress can fuel northern corn leaf blight

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Whereas it’s vital to remain present on new and rising ailments of the corn crop, it’s nonetheless vital to maintain tabs on the previous standbys, reminiscent of northern corn leaf blight.

“We know the weather’s been favourable for diseases, and we get lots of calls on that,” says Alberta Tenuta, plant pathologist at OMAFRA. There’s a protracted historical past of northern corn leaf blight, and Tenuta says that it’s right here, it’s at all times going to be right here, and don’t neglect about it, yr over yr.

On this episode of RealAgriculture’s Corn College, Tenuta is joined by Bernard Tobin on the Ridgetown campus fungicide trial, to take a look at the signs of northern corn leaf blight, to speak about how briskly the illness can advance, and the perfect climate for this fungus to progress.

Signs vary from elongated cigar-shaped lesions, to a lot bigger lesions that broaden throughout the leaf. Many occasions, these lesions present up when the leaf has curled and the moisture stays the longest, says Tenuta.

Humid situations, in addition to situations that stress the plant, are perfect for the fungus to maneuver in and advance, and Tenuta says that he’s seen wherever of as much as 50 to 60 bushel yield hit, or extra.

“For most growers, you’re looking at a five, to 10 to 15 bushel yield hit, that’s pretty significant, especially with good corn prices,” says Tenuta, including to recollect hybrid scores and that completely different blight races will have an effect on the hybrids otherwise.

There are a whole lot of fungicide choices for management on the market, and the timing is at tassel, says Tenuta.

By no means has anybody been so excited to see signs of a illness within the discipline, however Tenuta is, see the video beneath for extra on managing the danger of Northern corn leaf blight, and extra:

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