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CONTENTS

1 .................................................................ARLINGTON AGRONOMY/SOILS FIELD DAY TO BE HELD ON AU-GUST 25

1 .................................................................SOYBEAN PLANTING DATE, SEEDING RATE AND SEED TREAT-MENT

2 .................................................................2021 HANDY BT TRAIT TABLE AVAILABLE

2 .................................................................NEW FUNGICIDE USE WEB BOOK FROM CROP PROTECTION NET-WORK

3 .................................................................WSMB FREE SOYBEAN CYST NEMATODE TESTING IS BACK IN 2021

4 .................................................................UW-MADISON RESEARCH RE-PORTS

4 .................................................................WISCONSIN DATCP PEST BULLE-TIN CHANGES FOR 2021

5 .................................................................WATCH FOR MORE “BUMPER CROPS” VIDEOS

6 .................................................................VEGETABLE CROP UPDATES NEWSLETTERS 1, 2, 3

ARLINGTON AGRONOMY/SOILS FIELD DAY TO BE HELD ON AUGUST 25

The Departments of Agronomy and Soil Science in collaboration with the Arlington Ag Research Station are planning to hold the annual Agronomy/Soils Field Day on August 25, 2021. There will be numerous changes to event logistics to meet public health guidance related to COVID-19. Look for more information about the program and registration requirements in June.

SOYBEAN PLANTING DATE, SEEDING RATE AND SEED TREATMENTSHAWN P. CONLEY, SOYBEAN AND WHEAT EXTENSION SPECIALIST, DEPARTMENT OF AGRONOMY, UNIVERSITY OF WISCONSIN

When I am asked a direct question from a farmer or a crop consultant my re-sponse is always as follows…Do you want the short answer or the long answer as I can say the same thing in 5 minutes or 5 hours. Their response to me is almost always the same…”Just the Facts Jack”. However as we all know brevity can be a gift or a curse depending upon the context of the question. With that being said here we go!

Here is a blog post to answer these questions >>>

https://coolbean.info/2021/04/11/just-facts-jack-soybean-planting-date-seed-ing-rate-seed-treatment-recommendations/

Here is a short video to answer these questions >>>

UNIVERSITY OF WISCONSIN CROP MANAGER APRIL 23, 2021

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2021 HANDY BT TRAIT TABLE AVAILABLEBRYAN JENSEN, UW DEPT. OF ENTOMOLOGY AND IPM PROGRAM

It may be difficult for some of us to believe that Bt corn hybrids have been commercialized for 25 years! For others, Bt hybrids have been a standard insect management practice for their entire professional career. These bioengineered hybrids have certainly provided benefits which include a landscape level reduction of European corn borer populations. Bt hybrids have also ushered in a changing strategy that has crop advisors managing and mitigating Bt resist-ance.

It is hard to predict what the next decade might bring. However, for the time being, knowing the specific Bt proteins offered within each trait family will be an important piece of information we need to effectively management our target species and to slow the spread of Bt resistance. The recently revised 2021 Handy Bt Trait Table will be an important reference tool. Dr. Chris DiFonzo, Michigan State University, has provided this great resource which allows us to determine the specific proteins available in each trait family. Allowing us to easily understand seed companies guides and promotional materials so that we know which proteins we are currently using.

NEW FUNGICIDE USE WEB BOOK FROM CROP PROTECTION NETWORK

The Crop Protection Network (CPN) has produced a new web book called Fungicide Use in Field Crops. Fungicides are an important crop protection tool for modern agriculture, and proper use decreases risk of fungal diseases and economic losses. This book highlights the importance of fungicides for yield protection, while considering economics, risks to humans and the environ-ment, and prolonging use of fungicide modes of action.

This book is a collaboration among 13 crop specialists representing eight U.S. universities and Ontario, Canada. It considers the most recent advances in fungicide science to equip farmers, agribusiness employees, and others, with essential information to effectively manage diseases of field crops using fungi-cides.

“Farmers and agronomists deal with crop protection issues constantly in order to optimize yields,” said Daren Mueller, Extension Plant Pathologist at Iowa State University. “The goal of this CPN web book is to provide an overview of the current knowledge of fungi-cides, promoting best fungi-cide use practices, and how they help protect field crops from disease.”

(Photo) Researchers testing foliar fungicide spray cover-age obtained using different types of application systems.

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Research like this informs best fungicide application practices to help improve crop disease management. Photo by Brandon Kleinke.

Other multi-state fungicide resources from the CPN include Foliar Fungicide Ef-ficacy Guides for corn, soybean, and wheat. A Seed-Applied Fungicide Efficacy Guide is available for soybean.

CPN is a multi-state and international partnership of university and provin-cial Extension specialists, and public and private professionals that provides unbiased, research-based information. CPN’s goal is to communicate relevant information to farmers and agricultural personnel to help with decisions relat-ed to protecting field crops

Access Fungicide Use in Field Crops here or by going to www.cropprotection-network.org. For more information contact: cropprotectionnetwork@gmail.com

WSMB FREE SOYBEAN CYST NEMATODE TESTING IS BACK IN 2021ANN MACGUIDWIN, DAMON SMITH AND SHAWN P. CONLEY, UW-MADISON

The WI Soybean Marketing Board (WSMB) sponsors free nematode testing to help producers stay ahead of the most important nematode pest of soybean, the soybean cyst nematode (SCN). Eggs of SCN persist in the soil between soy-bean crops so a sample can be submitted any time that is convenient. The soil test report indicates the number of eggs in the sample and is useful for select-ing the right variety for the next soybean crop. Retests of fields planted with SCN-resistant varieties over multiple years shows how the nematode popula-tion is responding to variety resistance and provides an early warning should the nematode population adapt to host genetics.

In the spring of 2012, the WSMB expanded the nematode testing program to include other pest nematodes in addition to SCN. These nematodes are less damaging to soybean than SCN but can cause enough yield loss to warrant treatment. As is the case for SCN, there are no rescue treatments for nem-

atodes so the primary purpose of this year’s soil test is to plan for next year’s crop. Soil samples collected in corn for nematode analysis have predictive value for explaining yield if they are col-lected before the corn V6 growth stage. Sampling early in the season will provide information about the risk potential for the current corn crop AND the next soybean crop.

The assays used to recover nema-tode pests other than SCN in soil require that the nematodes are alive. So, it is important to keep the samples moist and at least room temperature cool. Collecting

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a sample that includes multiple cores ensures that there will be plenty of root pieces to assay. It is not necessary to include live plants in the sample. The soil test report will indicate which pest nematodes are present and at what quan-tities and their damage potential to soybean and corn based on the numbers recovered.

For more information on SCN testing and management practices or to request a free soil sample test kits please contact: Jillene Fisch at (freescntest@mailplus.wisc.edu).

Click to view more information on our WI SCN testing program, visit The SCN Coalition or watch this video of the UW lab.

Remember the first step in fixing a nematode problem is to know if you have one! The WSMB sponsored nematode testing program provides you that op-portunity. So Wisconsin farmers….”What’s you number?”

UW-MADISON RESEARCH REPORTS

2020 WISCONSIN FIELD CROPS FUNGICIDE TEST SUMMARY

Each year the Wisconsin Field Crops Pathology Program conducts a wide array of fungicide tests on alfalfa, corn, soybeans, and wheat. These tests help inform researchers, practitioners, and farmers about the efficacy of certain fungicide products on specific diseases…

The 2020 Wisconsin Field Crops Fungicide Test Summary is available by clicking here.

2020 ON-FARM SOYBEAN TRIALS REPORT

Boots on the Ground: Validation of benchmarking process through an integrat-ed on-farm partnership. Analysis of producer survey data performed during our previous 3-year NCSRP-funded bench marking project …

Download or view PDF report, click this link.

2020 WISCONSIN WEED SCIENCE RESEARCH REPORT

The 2020 Wisconsin Weed Science Research Report is now available.

View or download the report by clicking here. PDF File (119 pages)

WISCONSIN DATCP PEST BULLETIN CHANGES FOR 2021KRISTA HAMILTON, ENTOMOLOGIST, WISCONSIN DEPARTMENT OF AGRICULTURE, TRADE AND CONSUMER PROTECTION

Spring has arrived and our busy field season is officially underway. The past year has brought considerable change to the Pest Survey Program at DATCP. We have used this period of transition as an opportunity to reevaluate many aspects of our work, including how we collect and report our important survey data. One outcome of lengthy discussions is that we will no longer offer the

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Wisconsin Pest Bulletin in its traditional form. We have made upgrades to our field data collection capabilities and are introducing new efficiencies to the program this season. We’ve also determined that the time has come to trans-form our weekly publication into a more streamlined and accessible format.

Our pest monitoring data will be available on the DATCP Pest Survey page: DATCP Home Wisconsin Pest Surveys.

Please use this landing page to link to our pest monitoring network results for apple orchard pests, black light traps, black cutworm, corn earworm, true armyworm and western bean cutworm. Current growing degree day accumu-lations are also available by clicking Degree Days in the right sidebar.

In addition, we are excited to announce that we have partnered with EDDMapS and AgPestMonitor to bring you our counts via their platform, which features time series maps of our black cutworm, true armyworm, corn earworm and western bean cutworm trap catch data: Insects – Corn ipmPIPE.

We will continue to update our pest monitoring network pages each Thursday throughout the growing season. You can expect to receive a weekly notifica-tion when the latest counts are posted.

Although the Wisconsin Pest Bulletin will no longer be offered, please be assured that our field surveys remain as strong and timely as ever, and that our significant work continues. It’s only our reporting format that has changed.

WATCH FOR MORE “BUMPER CROPS” VIDEOS

In this “Bumper Crops” episode the current topics around early season wheat management are discuss by Damon Smith, Extension Specialist, Field Crops Pathology, and Shawn Conley, Soybean and Wheat Extension Specialist.

Click to view >>> Wheat, in Spring

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VEGETABLE CROP UPDATES NEWSLETTERS 1, 2, 3AMANDA GEVENS, EXTENSION SPECIALIST, PLANT PATHOLOGY DEPARTMENT

UW-Madison Division of Extension Vegetable Crop Updates Newsletter #3.

In this issue please find updates on potato production and production resourc-es (commercial and home gardener) as well as potato common scab manage-ment.

UW-Madison Division of Extension Vegetable Crop Updates Newsletter #2.

In this issue we address updates to our UW Madison Division of Extension Veg-etable Disease and Insect Forecast Network web tool.

UW-Madison Division of Extension Vegetable Crop Updates Newsletter #1.

In this issue we address:

• Linex special registration updates

• Disease forecasting and other vegetable information resources

• Overwintering and migratory insect updates