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Twisted Whorls and Yellow Leaves Making an Appearance

Twisted Whorls and Yellow Leaves Making an Appearance

By Mark Licht

It is that time of year when twisted whorls and yellow leaves are making an appearance in corn fields across the state. This is commonly referred to by many names, regardless, it is nothing to be overly concerned about unless it is very prevalent in your fields.

High prevalence could be related to growth regulator herbicides or even a hybrid with a higher tendency for occurrence. Wait a couple days with sunlight and a little wind and you’ll hardly notice it even existed.

Here is more information on rapid growth syndrome.

Source : iastate.edu

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Introduction to Crop Scouting

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Crop scouting is a vital part of Integrated Pest Management (IPM), helping identify pests, optimize input use, and protect yields. Scouts act as the grower’s field observers, offering timely insights.

In this webinar, Liz Gartman, UW–Madison Extension regional crops educator, provides an introduction to crop scouting, covering everything from pre-field preparation to in-field tools, resources, and best practices.

Preparation includes understanding field history, gathering tools, and setting communication expectations. In the field, scouts assess plant health, pest presence, and environmental stress using systematic patterns. Accurate documentation and clear reporting are essential. Tools like soil surveys, weather data, and pest calendars support decision-making. Ultimately, crop scouting builds trust, supports sustainability, and ensures informed, timely responses to field conditions.