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Watch for early-season pests when crop development is slow

  • May 17, 2021

While cool temperatures are not necessarily “good” for pests (they need heat units to develop too), conditions that delay growth do leave the crop in a vulnerable stage for a longer period of time. Combined with the stress of wet, cool conditions, early season pests can reduce stands and result in replants.
Seedcorn maggot. We have been receiving reports of seedcorn maggot damage in soybean this year, driven by slow germination in many fields during the window of larval activity.…

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2020 Applied Research Results now available

  • January 27, 2021

Every year, University of Illinois entomologists and plant pathologists conduct a variety of field experiments to evaluate control methods, survey for invasive and established pests, and inform management decisions for plant diseases and insect pests. We publish the results of these experiments in an annual report, which is available to view or download for free at the following link: https://uofi.box.com/v/2020PestPathogenARB
Image of the 2020 Applied Research Results cover
In addition to control evaluations on a variety of pests, this years guide includes:

  • Surveys of red crown rot and corn nematodes
  • A (thankfully negative) survey for the potential invasive soybean gall midge,

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2020 Insect Numbers Low in Many Areas of the State

  • October 1, 2020

Despite the chaos that 2020 has brought us, the Illinois statewide corn and soybean insect survey was completed this past summer. With the goal of estimating densities of common insect pests in corn and soybean cropping systems throughout the 9 crop reporting districts in Illinois, this is the 9th year the survey has been done (2011, 2013-2020).
 
Like previous years, 4-5 counties are surveyed in each crop reporting district, with 5 corn and 5 soybean fields sampled in each county.…

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Wrapping Up Insect Management for the Year: Pod and Seed Feeding in Soybean

  • September 9, 2020

In terms of insect management, we are pretty close to the finish line for corn and soybean in Illinois. However, there has been a late-season onset of bean leaf beetles in soybean in some parts of the state. Pod and seed feeders are one of the last insect pest threats we face in soybean, so let’s review our management guidelines as we wrap the season up.
Bean leaf beetles and pod scarring
We have seen some fairly large bean leaf beetle populations in central and northern Illinois over the last couple of weeks.…

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Assessing Corn Rootworm Damage – Now is the Time

  • August 18, 2020

Corn rootworm activity, in general, appears higher in much of Illinois than it has been for the last several years. Along with higher activity, resistance to Bt traits in western and northern corn rootworm remains our top insect management concern in Illinois corn. We are at a bit of a disadvantage with this insect in that the damage occurs below ground – it is not always obvious that we have a rootworm problem until it is severe enough for lodging to occur.…

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Spider Mites in Soybean

  • July 8, 2020

Spider mites often show up when it’s hot and dry outside. Given our current weather (and the promise of more heat to come), it’s a good time to review our scouting and management recommendations. Spider mites feed on a wide variety of plants, and usually enter soybean fields from grassy edges – especially right after the edges have been mowed, which causes the mites to seek out a new food source. (If you have the option,…

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2019 Applied Research Results, Field Crop Disease and Insect Management now available

  • January 7, 2020

The 2019 edition of our annual report on applied research in field crop disease and insect management can be downloaded at the following link: https://uofi.box.com/v/2019PestPathogenARB
 
Each year, University of Illinois plant pathologists and entomologists produce a summary of the applied research we have conducted to inform disease and insect management practices in Illinois. This information provides a non-biased, third-party evaluation of control tactics such as pesticides and resistant varieties for use in corn,…

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UIUC Field Crop Extension Conferences- Sign up today!

  • December 19, 2019

What do you need to know for the 2020 growing season? The University of Illinois will address several key topics at four regional conferences around the state in January and February. The meetings will provide a forum for discussion and interaction between participants, University of Illinois researchers, and Extension educators.
Conference dates and locations are:
Jan. 22 DoubleTree by Hilton, Mount Vernon
Jan. 29 Brookens Auditorium at University of Illinois, Springfield
Feb.…

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Statewide Corn and Soybean Survey Indicate Lower Insect Populations in 2019

  • November 21, 2019

The Illinois Statewide Corn and Soybean Insect Survey has been occurred in eight of the last nine years (2011, 2013–2019). These surveys have been conducted with the goal of estimating densities of common insect pests in corn and soybean cropping systems. In 2019, 40 counties representing all nine crop reporting districts were surveyed, with five corn and five soybean fields surveyed in each county.
 
Within the soybean fields surveyed, 100 sweeps were performed on both the exterior of the field (outer 2 rows) and interior (at least 12 rows beyond the field edge) using a 38-cm diameter sweep net.…

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Insect monitoring in soybean: what to look for during pod fill

  • September 6, 2019

At this point in the season, most of our insect monitoring efforts are focused on soybean. There are several pests that can damage soybean during pod fill, and proper scouting is necessary to identify and, occasionally, control these insects. While not an exhaustive list, these are some of the insects and insect relatives to be on the lookout for as the growing season winds down.
Stink bugs. Stink bug (Fig. 1) feeding during pod fill (particularly R5- R6) can reduce soybean yield and quality.…

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