Dr. of plants - Preceon Agronomy Lead for Bayer Crop Science

Ames,IA
Joined January 2015
Andrew Penney retweeted
Cover crop strategies for this fall into spring of 2027: graincrops.mgcafe.uky.edu/ar…
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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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Cover crops, reduced tillage, water quality and soil health all matter. But they also have to fit into a system designed to produce high-yielding cash crops. In our recent episode, Dr. Chad Lee discusses finding that balance. 🔗: bit.ly/4meDxx8 🎙️ @kentuckycrops
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Soil health. It’s a hot topic, and we’re talking about it. 🌱 Dr. Chad Lee helped Sean realize that the better we manage our soils, the more self-sufficient they can become. Find out how: bit.ly/4meDxx8 🎙️ @seanblomgren
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Andrew Penney retweeted
We can use cover crops to reduce erosion AND terminate them before they become a “weed” for corn.
Are cover crops a practical solution for managing ground that produces bourbon-quality corn? They sure are. Hear from University of Kentucky’s Dr. Chad Lee on cover crops, nitrogen, soil health and bourbon production. 🔗 bit.ly/4meDxx8 🎙️@kentuckycrops
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Andrew Penney retweeted
Farmers are the true innovators. Part of our job is figuring out which innovations can be applied to more acres.
Would you believe farmers in the 1950s and ’60s were conducting on-farm research on erosion management? Tune in to our latest episode with @kentuckycrops to hear about these early trials and what they can still teach us today. 🔗 bit.ly/4meDxx8
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Loved the conversation with @KentuckyCrops! His passion and agronomic knowledge on crop production, cover crops, and the impact our farming practices have on our soil is second to none!! Enjoy 😊
Would you believe farmers in the 1950s and ’60s were conducting on-farm research on erosion management? Tune in to our latest episode with @kentuckycrops to hear about these early trials and what they can still teach us today. 🔗 bit.ly/4meDxx8
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Are cover crops a practical solution for managing ground that produces bourbon-quality corn? They sure are. Hear from University of Kentucky’s Dr. Chad Lee on cover crops, nitrogen, soil health and bourbon production. 🔗 bit.ly/4meDxx8 🎙️@kentuckycrops
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We often forget just how blessed we are to care for and work the land here in the Corn Belt. Join us tomorrow as we release a new episode featuring the University of Kentucky’s @kentuckycrops , where we take a deep dive into soil health from a variety of angles. @
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You can skip an application and the world won’t end. Yup, we said it. When margins are tight, knowing where you can cut back without sacrificing yield is important, and inputs might be the place. Get the info: bit.ly/4meDxx8
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Episode 2!! This was such good info from @castellmj and @ajmargenot. These topics are hard to understand, but they do such a good job of explaining nitrogen and phosphorus, everyone can begin to understand N & P!
The nitrogen experts and agronomy nerds are back together to tackle how nitrogen management on your acres can impact your yields, environmental impact and bottom line. Hear the insights and real solutions you can put to work on your acres. 🔗 bit.ly/4meDxx8
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After our conversation, we were blown away by the insights @castellmj and @ajmargenot shared with us. Dr. Mike Castellano was especially excited about the discussion, and we’re excited for you to hear it. Lucky for you, the latest episode drops tomorrow!
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At some point, additional inputs don’t pencil out. Knowing where that point is matters to your bottom line. Tune in to our latest episode to hear how the optimum nitrogen rate can impact crop success and profitability. 🔗 bit.ly/4meDxx8
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One of the best analogies I’ve heard yet! :)
We appreciate memorable agronomy analogies, and Dr. Andrew Margenot gave us just that. Nitrogen | Phosphorus Fleeting | Sluggish Beer |Tequila Sometimes the best way to understand nutrient behavior is with a good analogy. bit.ly/4xXVLbz
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Water quality matters. So does getting nitrogen rates right. The goal is finding the right balance between crop productivity, nitrogen use and nutrient loss. Hear how it works: bit.ly/4meDxx8
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Everyone is always saying to take soil samples, and they aren’t wrong. But want a clearer picture of nutrient removal? Test the grain coming off your acres. Grab that data this fall to see what nutrients left your fields this growing season.
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Red crown rot confirmed in Iowa: crops.extension.iastate.edu/…. For this season, there is nothing to be done from a management standpoint. However, confirming “SDS patches” are actually SDS will be important for making management decisions in future years. @ISUCropNews @IowaSoybeans
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Talk about being excited for an episode to drop! @seanblomgren did an awesome job getting @ajmargenot from the great @UofIllinois on the show. That, plus @castellmj from @isuagronomy, doesn’t get much better!
What happens when you put two nitrogen experts in a room with two agronomy nerds? A podcast packed with science-based nitrogen insights. Hear from @castellmj and @ajmargenot on nitrogen in row crop systems. 🔗 bit.ly/4meDxx8
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Symptoms of corn stunt are being observed this season in late planted corn in OK Growers from all US can have corn leaf samples tested for FREE at my lab Please contact me if you suspect corn stunt symptoms in your field
Corn stunt management requires an integrated approach combining cultural practices, host plant resistance, and management of the insect vector. There is no curative treatment for infected plants. Management efforts should focus on suppressing corn leafhopper populations across the regional landscape, thereby preventing early infection of corn plants and reducing disease spread within and between fields. Find out more in the new Overview of Corn Stunt at cropprotectionnetwork.org/pu…. From @MahDuffeck @alisonrISU @westksbugs @badgercropdoc @DTelenko @cropdoc08 @baldpathologist @travisfaske @TXPanhandle_IPM @IvairValmorbida @dawkerns @DaisyHAhumada @rodrigobonofre @maddishires @alabamaED @BorisCamiletti @cahuparo +more. @NationalCorn @southernipm @msturdi @LSUAgCenter @nick_seiter @AlbertTenuta @MartinChilvers1 #corn
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Andrew Penney retweeted
The many faces of target spot. Some symptom presentation likely related to varietal differences as well as microclimate within the canopy. Even in a dry year, with irrigation (furrow or overhead) target spot can flourish within the canopy @MSSOY
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