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Understanding Tar spot forecasts

Recently I posted information on Twitter about tar spot forecasts that I will be making on my website throughout the season.  It is important to know how to interpret these forecasts.  For more information, see the article by clicking hereRead more

Tar spot risk in Illinois 6/21/19

As many of you are aware, our tar spot coalition is working to refine a tar spot model developed by colleagues at the University of Wisconsin Madison this season.  This model, currently named Tarspotter, uses weather data to predict risk of tar spot disease on corn. … Read more

Seed treatments for sudden death syndrome- make sure to include that base

When you are out at the club, dropping the bass is a good thing.  When you are planting soybeans and have soil pathogen issues, dropping the base can be a bad thing.  Why?  See the new article posted on the Field Crop Disease Blog found by clicking here.… Read more

Layering Soil-Residual Herbicides in Soybean

Applying soil-residual herbicides with non-residual, foliar-applied herbicides can help reduce additional weed emergence following application and, therefore, reduce the need for another application later.  The “lateness” of this year’s soybean crop undoubtedly will decrease the number of acres where layered residuals are applied, but nonetheless keep in mind that labels for most soil-residual herbicides used in foliar applications include soybean growth stages or time intervals beyond which applications cannot be made. … Read more

New mapping system to monitor corn rusts

This season we will be using a new system to monitor and  track southern rust in Illinois #corn.  We will be operating and managing a site that clientele can access and view in real time.  I will provide information pertaining to the site once it is operational in a few days.… Read more

Managing Prevented-Planting Fields

With a lot of acres of corn and soybeans still unplanted as we move into the second half of June, prevented planting (PP) is unfortunately going to be a major part of the story of the 2019 cropping season in Illinois.… Read more

Fungicide efficacy for foliar corn and soybean diseases

Each year our team of plant pathologists collaborate to develop efficacy tables for fungicides that can be used to help manage fungal diseases in field crops.   Our most recent sheets can be found by clicking the following links:

CDWG Fungicide efficacy table_2019_final

Soybean Fungicide efficacy table_2019_final

These sheets will eventually be housed for download on the Illinois field Crop Disease Page along with factsheets, applied research data and guides,  scouting videos, and other updates in the near future. … Read more


SPRINGFIELD, IL – The Illinois Department of Agriculture (IDOA) announced today it will extend the application date the herbicide dicamba can be applied on soybeans in Illinois for the 2019 growing season until July 15. In February, the Department approved state-specific labels allowing for dicamba use on soybeans only until June 30. … Read more

Differentiating Holcus spot from herbicide drift

This week I have had several calls and emails regarding the appearance of a minor disease of corn called Holcus spot.  Click here to view my article on Holcus spot and tips to differentiate it from herbicide drift.… Read more

Scouting for Early Season Pests in Corn and Soybean After a Late Start

It goes without saying that this spring has been a challenge. With extreme planting delays throughout the state, crop development is well behind normal expectations, while insect pest populations have continued to progress. In addition, the tight schedule we have faced has forced planting into less than ideal conditions in terms of both soil moisture and weed control, which can have consequences for insect pest management.… Read more