As the growing season progresses to the maturity stage, it’s a good time to evaluate the crop and consider your harvest plans. Many farmers approach harvest pragmatically, analyzing the logistics of moving machinery and computing the hauling distance for grain storage or sale.

Harvesting a crop based on logistic parameters isn’t a bad strategy. However, if your goal is to harvest as many corn bushels as possible, it’s important to evaluate the plant health of each field.

Because most of the Corn Belt experienced wet spring weather and conditions favorable to disease during the growing season, Channel Seedsmen are on the lookout for disease pathogens that can stress corn plants and significantly reduce yields.

Gray leaf spot and northern corn leaf blight are primary foliar disease pathogens that our Seedsmen are looking for. Anthracnose stalk rots and other stalk diseases could affect plant health as grain fill progresses.

Channel Seedsmen use two tests to evaluate plant health during the maturity stage: the push test and the pinch test. For both tests, sample 20 plants in five representative field locations.

If 10% to 15% or more of plants fail either test, the field is at risk for severe stalk lodging and should be prioritized for harvest to prevent losing yield due to downed corn.

The push test helps determine the sturdiness of corn stalks and simulates a wind event. Push a stalk to a 45-degree angle, or until the tassel touches the tassel of the next row. If the stalk buckles, it could be cannibalized or have stalk rot.

For the pinch test, squeeze stalks between the second and third node from the ground. Hollow stalks might make a popping sound as air within the stalk rind compresses.

Channel Seedsmen are experts at evaluating plant health and can help you prioritize and time fields for harvest. Visit Channel.com/FindYourSeedsman to connect with a Seedsman in your area.

Channel® Channel® and the Arrow Design® are trademarks of Channel Bio, LLC. © 2019 Bayer Group. All rights reserved.

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