Extension/Research Professor and Plant Pathologist with Mississippi State University at the DREC - corn, cotton, grain sorghum, rice, soybean, and wheat

Stoneville, MS
Joined August 2009
Wondering if ripping increases soybean yield? Our 2026 data show a 5.5 bu/ac increase from fall ripping compared to no ripping at the 75% confidence level on non-irrigated ground in Starkville. More to come from @MSSOY @MSU_AG @MSUEFieldCrops
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On this episode of I See Dead Plants, we're digging into the science of plant disease forecasting and exploring how models can help growers anticipate disease risk before the damage is done! #PlantPathology #PlantDisease #Agriculture #CropProtection #AgPodcast
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Mississippi soybean growers still have an opportunity to get free nematode testing. See our lab webpage for requirements to qualify extension.msstate.edu/lawn-a… #MSUext
“Fall soil samples collected after harvest (up to 6 weeks after the R8 growth stage) can be useful to monitor changes in [root-knot nematode] population densities or to make management decisions for the subsequent cropping season. Soil samples should be collected at an 8 to 10-inch (20 to 25-cm) soil depth within the root zone of the previously existing crop.” From the Overview of Root-Knot Nematodes cropprotectionnetwork.org/pu… by @travisfaske @baldpathologist @MartinChilvers1 @PACropDoc @dsmuelle @OnofreLab @ppp_trey @Nemasoil @alabamaED @DTelenko @AlbertTenuta +more @TheSCNCoalition @MahDuffeck @NematodeGuy @UFcropnematodes #USSoy
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Fusarium stalk rot causes shredded pith that may be tan to light pink. Brown streaks may be observed on the lower internodes. The fungi overwinter in corn residue, other dead plant residue, and in corn seed. Resistance to Fusarium stalk rot is available. Rotation and tillage will reduce inoculum. @DTelenko @badgercropdoc @MandyBish1 @MartinChilvers1 @maddishires @alisonrISU @TamraJacksonZ @baldpathologist @NationalCorn #corn #harvest26
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Working through purple seed stain and grain quality plots this week. Honestly, very little purple seed stain….but have a few plots with a good bit in a large Cercospora leaf blight variety trial @T_birdPathology
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Regularly monitor bins for potential issues. If grain becomes wet, use fans to increase airflow and reduce grain moisture levels, preventing fungal growth. If mycotoxin-producing fungi begin to grow in high-moisture corn, mycotoxin level in stored grain can increase. Be sure to wear proper personal protection equipment, if necessary, for examining grain bins. Read more at cropprotectionnetwork.org/pu…. From Extension. @travisfaske @baldpathologist @MartinChilvers1 @ppp_trey @badgercropdoc @AlbertTenuta @cropdoc08 @MandyBish1 @MahDuffeck @maddishires @DTelenko #corn #grain @NationalCorn @TamraJacksonZ @alisonrISU @alabamaED
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Anthracnose is likely the most prevalent stalk rot in the eastern United States. Affected plants have shredded pith and die prematurely. Anthracnose also causes a distinctive blackening of the stalk rind. The fungus overwinters in corn residue and infects plants through the roots or by spores that splash onto the stalk or are carried by insects that may introduce them into feeding wounds. The disease usually does not appear until late in the season and occurs more severely where corn follows corn, especially in reduced tillage. Resistance to anthracnose is available in some hybrids. If a hybrid is resistant to stalk rot, it is not necessarily resistant to the leaf blight phase. Rotation and tillage will reduce inoculum. @alisonrISU @MartinChilvers1 @badgercropdoc @TamraJacksonZ @alabamaED @MandyBish1 @DTelenko #corn @NationalCorn @maddishires @baldpathologist @travisfaske
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Tillage and rotation. Don’t be afraid to use steel! #MOREsteel
Many diseases survive in crop residue like tar spot, northern corn leaf blight, red crown rot, sudden death syndrome, and Fusarium head blight. Knowing the risks for your field can help inform future management decisions, like choosing disease-resistant hybrids or varieties for next season. @alisonrISU @baldpathologist @DTelenko @badgercropdoc @MartinChilvers1 @DylanMangel @BisonBeanDoc #corn #soybean #wheat
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Many diseases survive in crop residue like tar spot, northern corn leaf blight, red crown rot, sudden death syndrome, and Fusarium head blight. Knowing the risks for your field can help inform future management decisions, like choosing disease-resistant hybrids or varieties for next season. @alisonrISU @baldpathologist @DTelenko @badgercropdoc @MartinChilvers1 @DylanMangel @BisonBeanDoc #corn #soybean #wheat
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Corn leafhopper is back. The pest, which transmits the pathogens that cause corn stunt disease, has been confirmed in Jefferson, Livingston & Ontario counties. Both the corn leafhopper & corn stunt disease were found for the first time in New York State back in 2024. @MahDuffeck
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Foliar Fungicide Efficacy and Environmental Influences in Crop Disease Management. This new @PlantDiseaseJ article is published at apsjournals.apsnet.org/doi/a…. From @MorganGoodnight @mizuno_monica @NabinKDangal @DTelenko @dsmuelle +others.
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Check out the new @ISDPPodcast episode "The Crimson Crown: Soybean Red Crown Rot Uncovered" from Extension at open.spotify.com/episode/6JJ…. @BorisCamiletti @ILSoybean @FieldAdvisor @DTelenko @MartinChilvers1 #USSoy
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Thanks for leading this excellent work, @Edel_PLopez ! Your persistence sets an example for me! We can now officially call the MBSP pathogen as Candidatus Phytoplasma zeae!
Finally published! 💚 This paper brings nearly ten years of persistence full circle: 'Candidatus Phytoplasma zeae', the phytoplasma associated with maize bushy stunt, now has a species name. The story began during my PhD, working with native maize varieties in communities in Mexico. Studying this pathogen, I became convinced that it deserved recognition as a distinct species. Its sequence similarity to another species exceeded the usual threshold, but the guidelines at the time allowed ecological differences to support species delineation. We submitted the manuscript, went through peer review and revisions, and were ultimately rejected during the second round. That was a major disappointment. But the idea never left me. 🌽 Our work in Mexico: doi.org/10.1007/s10658-016-0… 🌽 Impact of MBS on communities: doi.org/10.1007/s10668-017-9… In 2025, finding Dalbulus maidis in Québec brought the question back with renewed urgency. By then, we were firmly in the genomic era, and the rules had changed. Revisiting the same biological question under different criteria was frustrating, and at times felt arbitrary. Still, we kept going. 🍃 Our discovery of Dalbulus in Québec: cell.com/cell-reports-sustai… After almost a year of discussion and revision following the preprint, we finally got there! For me, this is about much more than a name. Recognizing this pathogen as a distinct species will help us communicate more clearly with growers and decision-makers, connect research across countries, and draw attention to a disease becoming an increasing concern as its vector reaches new areas, both north and south in the Americas. What might happen beyond our continent remains an open question, although its known Dalbulus vectors are native to the Americas. Along the way, we have also been exploring the Dalbulus microbiome—and there is so much more to discover, including new microbial species that we look forward to describing! 🧫 Microbiome: doi.org/10.1093/ismehm/aazag… Bravo, @TPellegrinetti, for leading this work and helping bring a long-standing idea to fruition! 👏 And a heartfelt thank-you to all the amazing colleagues who contributed, both here on twotter and beyond: Joshua Molligan, Abraao Almeida Santos, @canale_cristina , @AOV_OlmedoVelar , Jordanne Jacques, @MahDuffeck , Ashleigh Faris, Paola Reyes Caldas, Jairo Rodriguez Chalarca, @DumonceauxTim 🌽 Some ideas stay with you for years. I’m very happy we stayed with this one. 📄 Read the paper: doi.org/10.1099/ijsem.0.0073…
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Just another Monday on the big green lawnmower cutting soybean plots
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Ode to a Grain Bin. A farming adaptation of John Keat's "Ode On a Grecian Urn." #poetry #grain #harvest26
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Cotton boll rots are caused by numerous fungi and bacteria. Identifying the primary pathogen is difficult due to non disease-causing fungi on rotten bolls. Yield losses are greater with frequent rainfall and dense crop canopies. Fusarium boll rot is the most common boll rot in the U.S., causing bolls to turn brown to black with pink or orange masses under humid conditions. Phytophthora boll rot shows soft, watery, black rot symptoms, while Xanthomonas boll rot starts as small, circular, water-soaked lesions that turn black when dry. Seed from infected bolls are likely to carry bacteria that can impact the subsequent crop. Managing plant growth, using pathogen-free seed, and controlling insects can reduce the impact of boll rots. Fungicide applications have limited efficacy in managing boll rots. @travisfaske @baldpathologist @bobkemerait @ppp_trey @DaisyHAhumada @MahDuffeck @OnofreLab @Cotton_Guy @CottonInc #cotton
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Spent the afternoon in the Delta with Dr. Kristy McAndrew’s lab looking at some stands of ash. Prolonged drought stress is taking a toll on a wide variety trees in this region of the state and is predisposing them to insect and disease problems. #MSUext
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