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Angie Peltier


Angie Peltier
Former Extension Educator, Commercial Agriculture



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Hill and Furrow

Current topics about crop production in Western Illinois, including field crops research at the NWIARDC in Monmouth.
Weeds
Figure. Small black specks (pycnidia) can help in diagnosing Diplodia ear mold.
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Scouting shouldn't end until after harvest

Scouting is a season-long commitment, beginning before planting (measuring soil temperature and assessing condition), continues after planting (assessing plant stands and then scouting for disease, insect and weed pressure) only ending after the crop has been harvested. Late season scouting of corn can include monitoring kernels for maturity (black layer) and moisture content and checki...

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Figure. First-year Palmer amaranth infestations are unlikely to look like the one captured by former Extension Educator Robert Bellm in this soybean field near St. Louis. The crop producer intended to mow this field in an effort to minimize additions to the soil weed seed bank.

Evaluate your herbicide-resistance management plan by answering these 5 questions

Posted by Angie Peltier - Weeds

Over time farm sizes have increased as the number of farmers has decreased. This, along with the trend toward soil conservation and the wide-spread adoption of no- or reduced-tillage, has led to the increased reliance on herbicides as the only weed management strategy many employ. Herbicides bind to specific molecules in plants -known as a herbicide's site of action (SOA)- which interferes with...

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Figure. First-year Palmer amaranth infestations are unlikely to look like the one captured by former Extension Educator Robert Bellm in this soybean field near St. Louis. The crop producer intended to mow this field in an effort to minimize additions to the soil weed seed bank.

Stakeholders needed: Herbicide resistance listening session at Commodity Classic

Posted by Angie Peltier - Weeds

Are you an Illinois farmer? How about an Illinois Ag chemical retailer, seed dealer, crop consultant, machinery/implement dealer, pesticide manufacture or public landowner? Are you planning on attending the Commodity Classic in San Antonio in March? Would you be willing to share your experiences regarding herbicide resistance management? If you answered yes…….....

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Figure. Waterhemp plants are beginning to poke their way through the canopy in many soybean fields in late July in Western Illinois.

Register before the deadline this Friday: Weed Management Workshop in Pekin and Lewistown

U of I Extension communications specialist Anita Wilkinson summarizes the workshops as follows: A weed management workshop will be held at the Fulton County Extension Office in Lewistown on Feb. 7 and the Tazewell County Extension Office in Pekin on Feb. 9. and will feature the following topics: Weed ID and growth habits Herbicide sites of action...

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Figure. Profile photo of the waterhemp infestation in a soybean field in Western Illinois in 2015.

Running Out of Options: The science behind herbicide-resistant weeds, a 1-hour live #askACES Twitter chat with University of Illinois weed scientists

Posted by Angie Peltier - Weeds

On Thursday, January 19 from noon-1 p.m. (CST) Dr. Pat Tranel and Dr. Aaron Hager from the Department of Crop Sciences will take part in an #askACES chat on Twitter to discuss the latest on herbicide-resistant weeds and the challenges they pose to production agriculture. Use #askACES to ask your questions about what causes resistance, how to manage resistance, what has to...

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W IL Map

Extension Bi-State Crops Conferences in and near Western Illinois

New and longer-term partnerships between personnel in Illinois and personnel in Missouri and Iowa have resulted in several bi-state crops conferences to be held during January 2017 in Western Illinois or Eastern Iowa. Friday, January 6, 2017: Bi-State Crop Advantage Conference, Burlington, IA, 8:30 AM - 4:00 PM...

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Registration now open for the 2017 Regional Crop Management Conferences

Registration is open for the 2017 Crop Management Conferences. These regional conferences provide a forum for discussion and interaction between participants and university researchers and are designed to address a wide array of topics pertinent to crop production in Illinois: crop management, pest management, nutrient management, soil and water management. Certified Crop Advisers can e...

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Figure. First-year Palmer amaranth infestations are unlikely to look like the one captured by former Extension Educator Robert Bellm in this soybean field near St. Louis. The crop producer intended to mow this field in an effort to minimize additions to the soil weed seed bank.

Make Preparations for Encountering Palmer Amaranth During Harvest

Posted by Angie Peltier - Weeds

Scouting from the Cab. While crop producers are encouraged to scout their corn and soybean fields throughout the entire growing season, the view of a field from the vantage point of a combine cab can be eye-opening, particularly when harvesting corn. One thing that can become abundantly clear is just how well the weed management strategy for the year kept weeds in check...

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NorthCentral-SARE-logo large

Grant Program for Farmers and Ranchers Interested in Increasing Sustainability

From soil erosion to compaction to weed management struggles, farmers know best what is may be limiting crop production or long-term sustainability in the fields that they farm. However during this period of razor-thin margins farmers may be unwilling or unable to fit the costs of experimenting with new conservation practices into their balance sheets. If you are a farmer that has an in...

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Figure. Waterhemp plants are beginning to poke their way through the canopy in many soybean fields in late July in Western Illinois.

Weed Management Resources - How do Your Fields Look?

Posted by Angie Peltier - Weeds

From reports of soybean fields near St. Louis destined for mowing rather than harvest to thick lawns of waterhemp beginning to emerge from soybean fields nearer to the Northwestern Illinois Ag R&D Center, weeds are a major problem in many Illinois farm fields in 2016. What in the world is going on? Why have weeds become such an urgent issue this year? There are likely severa...

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Figure. Poison hemlock leaf. In 2016 poison hemlock plants have grown very tall (up to 7 ft), forming dense shrubs. These carrot relatives produce alkaloid compounds that are toxic to humans and other animals when consumed.
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2016 is a bumper year for toxic weeds

Driving down any Western Illinois road this spring one can't help but notice just how many very tall weeds there are growing in field edges and along fence rows. According to University of Illinois USDA Weed Ecologist Dr. Adam Davis, every weed species has specific germination cues, or moisture and temperature fluctuations required for seeds to germinate and seeds of biennial plants to survive...

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Figure. Herbicide injury symptoms observed in soybean at the NWIARDC in 2016.
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Injury symptoms in soybeans from soil-applied pre-emergence herbicides

Herbicide injury symptoms have been widespread this year at the Northwestern Illinois Agricultural Research and Demonstration Center (NWIARDC) in Monmouth - on corn and now on soybeans. Soybeans were planted on May 12 and May 1...

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Figure. Herbicide injury symptoms on corn at the Northwestern IL Ag R&D Center in May, 2016.
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Cold, Cloudy, Wet Weather May = Herbicide Injury in Corn in 2016

Injury symptoms on corn plants. While passing by on the way to plant a bulk soybean field on Tuesday, personnel at the Northwestern Illinois Agricultural Research and Demonstration Center (NWIARDC) noticed that plants in one of the center's corn fields didn't look so hot ( Figures ). The crop was planted on April 16 and sprayed on April 25 before emergence....

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Figure. Flowering henbit in a Western IL field (photo credit: Angie Peltier, April 22, 2016)

Timely weed management is essential

Posted by Angie Peltier - Weeds

Many may remember the 2015 growing season as the one in which the weeds took over in many Western Illinois soybean (and some corn) fields. Abnormally wet weather led to saturated soils that were impassible for long periods of time before post-emergence herbicides were applied. Weeds were extra thick in those fields that relied on a post-emergence-only weed management plan. Whatever the factors...

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Davis example
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Online courses target weed and crop management topics

Each year the University of Illinois Extension's regional Crop Management Conferences offer hours of research-based education to farmers, Certified Crop Advisors, and other agricultural professionals. Interactive online courses were developed from 2015 conference presentations by University of Illinois Department of Crop Science faculty: New (and old) Tools for Delaying and Copi...

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Figure. Profile photo of the waterhemp infestation in a soybean field in Western Illinois in 2015.

Can I assume that these waist-high weeds are waterhemp plants?

Growing conditions influence growth and development of weed plants. Each of the past several growing seasons has seen unique challenges and triumphs. In 2012, favorable soil conditions allowed for early planting, soon followed by drought conditions. In 2013, record-setting spring rains delayed planting. While in 2014, mild temperatures and timely rain events led to record-setti...

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Figure. Soybeans are difficult to see from this vantage point due to all of the waterhemp plants in this field. Note that the field in the background appears from this distance to be weed-free.
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Weed management struggles in 2015: What happened?

Posted by Angie Peltier - Weeds

In my many hours spent behind a windshield this summer, I have noticed several fields that look like the one in the photos above. Although there are individual marestail and giant ragweed plants that have also poked their way through the soybean canopy, by and large the primary weed species competing with the soybean crop for water, nutrients, and sunlight is waterhemp. As the female flowers re...

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Figure. Attendees find some shade while listening to Dr. Emerson Nafziger talk about getting high soybean yields at the NWIARDC 2012 Field Day.
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Save the Date - NWIARDC 2015 Field Day!

Be sure to mark your calendars for the 34th Annual Northwestern Illinois Agricultural Research & Demonstration Center Field Day - this July 28 beginning at 8 AM!  Come and visit with University of Illinois research and Extension personnel as they share the results of farm-practical disease, pest, weed, and crop management research. Stay tuned for additional details rega...

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Figure. True armyworm moths captured using a pheromone trap. Moths are identified and counted to determine when large numbers of adults are migrating through the trap area and when to begin scouting.

What happens 1 to 2 weeks after 85 true armyworms land in my pheromone trap?

No this is not a trick question; let me explain. What are true armyworms ? True armyworms are insect pests of grasses and crops such as corn and small grains. Many of the Bt-traited corn hybrids express proteins that provide protection against the true armyworm. However, not every Bt hybrid provides pr...

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Figure. Corn planted April 1, experienced below freezing air temperatures early morning April 21 and 23. Note on the photo dated April 27,  although the above-ground tissue is dead, the growing point remains largely undamaged.
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Frost-damaged corn plants re-emerge: Will they act as weeds to their less-damaged neighbors?

Corn planting date trials. Each year, personnel at the Northwestern Research and Demonstration Center establish a replicated planting date trial. The trial established this year will tell us, given the conditions that will be experienced by the crop from planting until harvest, when was the best time to plant corn in Monmouth in 2015. Over a number of years and locations, these...

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Figure. Mesotrione injury on radish seedlings (Photo credit: Dr. Mark Bernards, Western Illinois University).

Year-round planning and careful herbicide selection required for fall cover crops

It seems as if cover crops have gotten a lot of press attention in the past several years, reaching a crescendo each year right before the time that they are established – late-summer to early fall. Unfortunately, decisions that were made at the beginning of the season can affect how well certain cover crops establish months later. Application rates listed on herbicide labels were developed in...

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Exciting Program Planned for the 2015 Regional Crop Management Conferences!

Registration is now open for the 2015 Regional Crop Management Conferences. These 2-day conferences provide a forum for discussion and interaction between participants and university researchers and are designed to address a wide array of topics pertinent to crop production in Illinois: crop management, pest management, nutrient management, soil and water management. Certified Crop Advi...

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Figure. Spray rig.(Image: Howard F. Schwartz, Colorado State University, bugwood.com).

Pesticide applicator training and testing locations and dates set

The Illinois Pesticide Licensing Act requires licenses for anyone using restricted use pesticides or applying either restricted or general use pesticides as part of their job. There are five different license types and 17 different categories of lic...

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Figure. The main menu screen for Spray Calc; there are four main functions as well as a link to information about the app and a help icon that details what each main function in the app can be used to calculate (Photo and caption: Scott Bretthaeur).

Free University of Illinois App Developed to Help Applicators with Sprayer Calculations

University of Illinois Extension has released a new smartphone app to assist applicators with many of the calculations that are used when setting up and calibrating a sprayer. Pesticide Spray Calculator, or "Spray Calc", was developed by Scott Bretthauer , Ex...

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Center sign

2014 NWIARDC Field Day to Highlight Hot Topics in Agriculture

The program is set for the 33 rd annual University of Illinois' Northwestern Agricultural Research Center Field Day. The program will begin at 8 am on Tuesday, July 15 th . Buses will carry members of the public to different stops in the research center where campus-based specialists or Extension personnel will present the results of crop and pest management research...

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