Assistant Professor & Extension Field Crops and Forage Entomologist | IPM | Entomology. Tweets are my own.

Columbia, MO
Ivair Valmorbida retweeted
I'm working on my 2026 Missouri crop yield summary. Stop me if you've heard this before, average isn't always average.
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Ivair Valmorbida retweeted
Registration is now open for the 2026 Missouri Crop Management Conference, December 3rd and 4th in Columbia ipm.missouri.edu/crop_manage…
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Ivair Valmorbida retweeted
Plant-parasitic nematodes represent an invisible yet significant yield constraint for soybean production. PhD candidate and SCN Diagnostics Nematode Testing Coordinator Jeff Barizon highlights findings from a recent statewide survey in Missouri: piped.video/watch?v=uG5qyMRh…
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Ivair Valmorbida retweeted
This important work provides the scientific basis for the taxonomic reclassification of maize bushy stunt phytoplasma. @fapesc
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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Ivair Valmorbida retweeted
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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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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Ivair Valmorbida retweeted
Virtual fence favors smaller operations, because labor costs are spread across fewer animals. Average cost per head for virtual fence and electric fence based for herd size. Labor, equipment, and infrastructure expenses included.
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Ivair Valmorbida retweeted
Delighted to share our most recent publication, entitled, 'Generating degree day models using metabolic rates'. This study advances modeling with physiology, saving time, money & improving accuracy. academic.oup.com/jee/advance…
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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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Ivair Valmorbida retweeted
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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Ivair Valmorbida retweeted
🧬 What started as a “crazy” conversation with @TPellegrinetti has become a global genomic resource, and today, it is officially published! By integrating 264 metagenomic datasets from 171 leafhopper species across 13 countries, we reconstructed 272 microbial genomes and created a global catalog of 337 non-redundant microbial genomes and 18.6 million genes. The results challenged several assumptions about these insects. Rather than forming a single, uniform system, leafhopper microbiomes have a modular, three-layer architecture: ancient nutritional symbionts, a flexible group of secondary symbionts, and a dynamic pool of environmentally acquired microbes. And one of my favorite parts: this study includes the first microbiomes ever characterized from Arctic leafhoppers! ❄️🦗 These insects harbored distinct microbial communities with annotated functions associated with cold tolerance, oxidative stress, and other environmental challenges (what a future PhD student will better understand!). This was truly a collaborative effort led by Thierry, together with Joshua Molligan, Abraao Almeida Santos, Nicolas Plante, Jordanne Jacques, Amélie Grégoire-Taillefer, Cristina Canale, Maíra Duffeck, Ashleigh Faris, Alejandro Olmedo, and Ivair Valmorbida. A fantastic team ! 🌎 It is even more special to see our paper appear in the very first issue of ISME | International Society for Microbial Ecology Host Microbe, a new journal filling a much-needed space for ecological and systems-level studies of host–microbe interactions, research that has too often fallen between traditional disciplinary boundaries. I could not be prouder of this team, and especially of Thierry, who transformed that “crazy” conversation into an extraordinary scientific resource. 🎉 📄 Genome-resolved metagenomics reveals conserved, flexible and emerging symbioses across global leafhoppers 🔗 doi.org/10.1093/ismehm/aazag… Thank you @NSERC_CRSNG ! Merci @RqradQc
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Ivair Valmorbida retweeted
🚨 We are recruiting three PhD students to join EdeLab at Université Laval in summer 2027! The projects will explore: 🧬 Evolution of ankyrin-repeat effectors in gall-forming plasmodiophorids 🦠 Microbiome-mediated insect adaptation to extreme environments 🍃 Leafhopper effectors at the plant–insect interface Applications are welcome in English or French until September 15, 2026. Full details are available in the attached PDF. Please share! 🔁 1/2
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Ivair Valmorbida retweeted
🚨🪲🏆 The news is officially out! Our study has won the 2026 @EntsocAmerica Environmental Entomology People’s Choice Award! 🎉 A huge bravo to Abraão and all our wonderful co-authors! 💚 Thank you to everyone who voted for and supported this beautiful work. We are incredibly grateful! 🪲🌿 See other winners here: academic.oup.com/insect-scie…
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With most soybean fields now in reproductive growth, it is the time to scout them. Current sweep-net thresholds are 10 stink bugs per 25 sweeps for grain soybeans and 5 stink bugs per 25 sweeps for seed production soybeans. @MizzouIPM
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Japanese beetle in soybeans. @MUExtension @MizzouIPM
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Japanese beetles are active in Missouri corn and soybean fields. Adult feeding on soybeans causes defoliation, while severe silk feeding in corn can impact pollination. Management decisions should be based on economic thresholds, not beetle presence alone.
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