Damon L. Smith

University of Wisconsin-Madison Professor and Ext. Field Crops Pathologist (corn, soy, wheat, alfalfa)

[Crop Protection Network @CropNetwork]

Research found no evidence that nitrogen application influences the severity of tar spot.

Read more at https://t.co/5B2T6RI1x2.

From @CheckJill & @MartinChilvers1 +others.

#corn @NationalCorn @MI_Corn

[Crop Protection Network @CropNetwork]

Fungicide ROI calculators for corn, soybean white mold, and alfalfa at https://t.co/RaXu613e1W.

@Ag_PMT @badgercropdoc @datascience_uw @MartinChilvers1 @DTelenko @BisonBeanDoc @hoperbecton @baldpathologist @travisfaske @alabamaED @alisonrISU @ppp_trey @DylanMangel @SpurlockLab @MandyBish1 @maddishires @YuanZeng3 #corn #soybeans #alfalfa #fungicide #grow26

[Damon L. Smith @badgercropdoc]

“What’s On Your Seed?” A Trusted Resource—Now Updated And Interactive! https://t.co/EUwgiQ4tbH

[Crop Protection Network @CropNetwork]

Anthracnose leaf blight lesions are tan or brown with dark margins. It is most common where corn follows corn and seldom causes yield loss.

Occurrence of leaf blight and stalk rot is not necessarily related despite being caused by the same pathogen.

#corn #disease #grow26 @DTelenko @alisonrISU @MandyBish1 @baldpathologist @alabamaED @badgercropdoc @MartinChilvers1

[Crop Protection Network @CropNetwork]

Crop disease forecasting and risk tool at https://t.co/2rBNfs2dqo.

Data for tar spot, gray leaf spot, white mold, and more.

@badgercropdoc @Ag_PMT @DTelenko @baldpathologist @SpurlockLab @YuanZeng3 @travisfaske @ppp_trey @MartinChilvers1 @alisonrISU @alabamaED @DylanMangel @DylanMangel @BisonBeanDoc #corn #soybean

[Damon L. Smith @badgercropdoc]

We found red crown rot in WI in 2025 in one county. Not widespread, but study up here so we can work together to track and manage this new disease of soybeans.

[Crop Protection Network @CropNetwork]

Red Crown Rot: Understanding its Impact and How to Manage it from Extension at https://t.co/GzyqFQSGFN.

@DTelenko @BorisCamiletti @cropdisease @MartinChilvers1 @MandyBish1 @baldpathologist @ILSoybean @missourisoybean #soybean #soy #grow26 #USSoy

[Shawn Conley @badgerbean]

@himmelbergbryce setting up the drone passes for our @WISoyCheckoff funded white mold and Mn foliar trials! Thanks Morris Farms for hosting us!

[Damon L. Smith @badgercropdoc]

Wisconsin Field Crop Disease Update – June 8, 2026. https://t.co/RaZvrm6E54

[Crop Protection Network @CropNetwork]

“Fungicide applications remain an effective tool for reducing white mold levels if applied between the R1 and R3 growth stages.

Not all fungicide products are equally effective at controlling white mold, with Endura® remaining the most effective product if applied between the correct growth stages.”

From the @PlantDiseaseJ article https://t.co/2Fq2gPRUZY by @BisonBeanDoc @mitch_roth12 @dsmuelle @MartinChilvers1 @DTelenko @SpartySpudNBeet @badgerbean @badgercropdoc +more #soybeans #whitemold #grow25 #agtwitter #agx #USSoy

[Shawn Conley @badgerbean]

@badgercropguy doing a field test to compare the efficacy of a drone versus ground rig for control of FHB! @badgercropdoc

[Crop Protection Network @CropNetwork]

Scouting for Soybean Stem Diseases pub from Extension at https://t.co/fOXO7c5Skv.

@cropdoc08 @baldpathologist @cropdisease @BorisCamiletti @MartinChilvers1 @DylanMangel @dsmuelle @badgercropdoc @AlbertTenuta @DTelenko @UMNExt @BisonBeanDoc @travisfaske @MandyBish1 +others #soybeans #AgTwitter #USSoy

[Damon L. Smith @badgercropdoc]

Make the decision to spray at 50% flowering and make sure those fungicide apps are done by 5 days after that date!

[Shawn Conley @badgerbean]

Check your winter wheat variety for flowering. It may be go time to make those applications of fungicide for management of Fusarium Head Blight! @badgercropdoc

[Crop Protection Network @CropNetwork]

In general, chemical nematicides move more readily in coarse-textured soils than fine-textured soils, assuming adequate water infiltration.

As a result, chemical nematicides often have a larger zone of root protection in coarse-textured soils than in fine-textured soils such as silts and clays.

Moreover, the zone of protection is more vertical like a “chimney” to protect the developing taproot rather than horizontal to protect lateral roots. 

Therefore, seed-applied nematicides typically work better in strongly tap-rooted crops such as cotton and soybean compared to fibrous root systems like corn.

Read more in "How Seed-Applied Nematicides Work" at https://t.co/Wix4v46A5E.

From @travisfaske @MartinChilvers1 @badgercropdoc @CFAES_OSU & @CUESNews. Funded by @CottonInc.

@UFcropnematodes @UFEntNem @UCDavisEntomolo @NematodeGuy #cotton #soybean #nematodes

[Shawn Conley @badgerbean]

Cut alleys in Waterloo today. Just a few flowers showing, but majority is not there yet. Make sure you’re scouting and applying fungicides as labeled and needed! @badgercropdoc wrote this article to ponder over. https://t.co/P89FtBrIpf

[Shawn Conley @badgerbean]

Soybean Yield and the 2026 “Super” El Niño: What Growers Need to Know. @ColetFabiano @Tatianesevero16 https://t.co/6LrnCz6k3s

[Crop Protection Network @CropNetwork]

"Most fungicides resulted in greater breakeven probabilities with increasing disease severity. The results emphasize that fungicide applications occurring at VT/R1 and when disease severity exceeds 5% are more likely to result in a positive economic gain."

From the @phytofrontiers article at https://t.co/nuhqww48h5.

By @NabinKDangal @badgercropdoc @baldpathologist @MandyBish1 @kmbiss @MartinChilvers1 @travisfaske @NDSUcerealpath @AG__McCoy @dsmuelle @rodrigobonofre @ppp_trey @alisonrISU @alabamaED @DTelenko @AlbertTenuta @cropdoc08 +others. #corn #fungicide #ROI @plantdisease

[Damon L. Smith @badgercropdoc]

Stripe Rust Found In Wisconsin In 2026. Get the latest information at Badger Crop Network! https://t.co/gwczScrPfg

[Damon L. Smith @badgercropdoc]

Wisconsin Field Crops Disease Update for May 18, 2026. https://t.co/qknwKTUFju

[Crop Protection Network @CropNetwork]

2026 Fungicide Efficacy for Control of Corn Foliar Diseases available at: https://t.co/gcGmy89UIR.

Based on multi-year research across corn-producing states. From Extension.

@cropdoc08 @DaisyHAhumada @baldpathologist @txextension @ccecornell @MandyBish1 @BorisCamiletti @MartinChilvers1 @PACropDoc @UFPlantPath @MahDuffeck @travisfaske @NDSUExtension @tjcksn @TNplantDR @bobkemerait @PatePlantSci @VACoopExt @UMNExt @dsmuelle @CUESNews @rodrigobonofre @CFAES_OSU @ppp_trey @alisonrISU @alabamaED @maddishires @DTelenko @AlbertTenuta @YuanZeng3 @NationalCorn #AgX #farming #AgTwitter #corn #fungicides