@IR4_Director

The @IR4_Project delivers safe and effective disease and pest management solutions for U.S. specialty crop growers. #ThinkAndDo #IAmPSI #CienciaColombia 🇨🇴

 Raleigh, NC
ir4project.org/
Joined January 2013
  • Tweets4.7K
  • Following6.2K
  • Followers7.7K
670Media
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectOct 15
Our HQ team had a fantastic time yesterday observing our annual Employee Appreciation Day. We had lunch, tackled an escape room, and got ice cream. How lucky are we to work with such talented professionals and wonderful people (near and far)! 🙌 🌟🍦 @IR4_Director #ir4project
2
2
89
Lina Quesada at The IR-4 Project retweeted
Phytopathology®@PhytopathologyJAug 5
Findings from K. Avila, M. Stahr, and @IR4_Director identify alternative hosts, infested soil, and infected roots as independent inoculum reservoirs that drive black rot epidemiology and threaten the sustainability of #sweetpotato propagation systems: doi.org/10.1094/PHYTO-11-25-…
Fig. 4. Symptoms of black rot at the base of sweetpotato slips following exposure to soil–root inoculum treatments. Treatments are listed as soil condition × root status: A, C × H = clean soil with healthy roots; B, C × I = clean soil with inoculated roots; C, I × H = infested soil with healthy roots; and D, I × I = infested soil with inoculated roots. Red circles highlight A, healthy or B to D, symptomatic tissue at the slip base.

ALT Fig. 4. Symptoms of black rot at the base of sweetpotato slips following exposure to soil–root inoculum treatments. Treatments are listed as soil condition × root status: A, C × H = clean soil with healthy roots; B, C × I = clean soil with inoculated roots; C, I × H = infested soil with healthy roots; and D, I × I = infested soil with inoculated roots. Red circles highlight A, healthy or B to D, symptomatic tissue at the slip base.

1
6
305
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectMay 7
This spring, IR-4's regional teams hosted their State Liaison Representative meetings to discuss pest challenges in each state. This time to connect around shared challenges and gaps in tools for growers helps teams prep for the Food Use Workshop. The work starts early! 🐦🪱
1
4
193
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectApr 16
Get to know IR-4's new Executive Director, Lina Quesada-Ocampo, through our new video 🌿 Until we can introduce her in person, we invite you to learn more about her specialty crop roots her vision for IR-4. Welcome, @IR4_Director! Full video here: ncst.at/b7IH50YKnSx
1
5
477
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectMar 31
This #WomensHistoryMonth (& every day), we’re proud to work with the incredible women who drive IR-4 forward and serve in every corner of the organization: from our new director at HQ, to our regional field & lab teams, to our advisors & stakeholders—we celebrate you! 👩‍🌾
1
2
156
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectMar 24
Happy #NationalAgDay! 🚜 Today, we celebrate the specialty crop growers who fill our plates with fresh produce 🍎🥦🍊 Let's honor this day by connecting with our local ag communities: ✅ Shop at a farmers' market ✅ Take a farm tour ✅ Learn from growers' perspectives
1
2
5
176
It was a wonderful first day, I am very grateful to be part of the incredible @IR4_Project community 🤩
The IR-4 Project@IR4_ProjectMar 9
Today is Lina Quesada-Ocampo's first official day as the Executive Director of IR-4. Please join us in welcoming Lina to our team!
10
572
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectMar 9
Today is Lina Quesada-Ocampo's first official day as the Executive Director of IR-4. Please join us in welcoming Lina to our team!
1
1
1
12
1,031
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectMar 5
This week in D.C., we thanked Todd Sholz of @USAPulses for his dedication and service to IR-4 as chair of the Commodity Liaison Committee (CLC). The CLC elected Jonathan Sarager of @WesternGrowers as its new chair. Congrats, Jonathan!
1
2
182
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectMar 3
Hello from D.C.! Today and tomorrow, we visit the Hill to spread the word about IR-4 along with our Commodity Liaison Committee & the Friends of IR-4. We'll be sharing these beautiful plants with everyone we meet, thanks to our friends at @American_Hort!
1
3
188
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectMar 2
The IR-4 Project's 2025 Annual Report has been published and is available on our website, along with the Year-End Summary, which offers some highlights from the more detailed report. Read the report: ncst.at/1XwN50Yoi5L
2
2
297
Lina Quesada-Ocampo has been named the new executive director of the IR-4 Project, effective March 9. Quesada-Ocampo brings over 15 years of experience in applied pest management research and Extension work to the role. Read about her and the appointment: ncst.at/fWJI50YkrYn
Lina Quesada-Ocampo is the new executive director of the IR-4 Project, a national program that assists specialty crop growers by facilitating safe and effective pest management tools and product registrations for fruits, vegetables, nuts, flowers and nursery crops.

ALT Lina Quesada-Ocampo is the new executive director of the IR-4 Project, a national program that assists specialty crop growers by facilitating safe and effective pest management tools and product registrations for fruits, vegetables, nuts, flowers and nursery crops.

1
2
9
394
Lina Quesada at The IR-4 Project retweeted
MPMI Journal@MPMIjournalFeb 23
C. H. Parada-Rojas et al. present a reference-quality NLRome for the hexaploid sweetpotato and diploid wild relatives. Learn more: doi.org/10.1094/MPMI-03-25-0… @LinaQuesadaO
Fig. 4. Sweetpotato genotypes and wild relatives harbor a compact NRC-H subclade. Maximum likelihood (ML) phylogeny of complete coiled-coil nucleotide-binding and leucine-rich repeat immune receptor (CNL) proteins identified across all 35 sweetpotato and wild relative genotypes, using NB-ARC domain sequences as predicted by NLRtracker. Branches predicted to correspond to major nucleotide-binding and leucine-rich repeat receptor (NLR) required for cell death (NRC) helper and sensor clades (NRC-H, NRC-S) were highlighted based on phylogenetic placement of NRC0/1 (helpers, purple) and Hero-A, Rpi-amr3i, and Bs2 (sensors, green), respectively. Tips linked to CNLs containing integrated domains are labeled with yellow dots. The purple phylogenetic tree (right) includes only sequences from the indicated NRC-H lineage (left), underlining the Ipomoea batatas, I. trifida, I. triloba, and I. littoralis sequences phylogenetically predicted as helper NLRs.

ALT Fig. 4. Sweetpotato genotypes and wild relatives harbor a compact NRC-H subclade. Maximum likelihood (ML) phylogeny of complete coiled-coil nucleotide-binding and leucine-rich repeat immune receptor (CNL) proteins identified across all 35 sweetpotato and wild relative genotypes, using NB-ARC domain sequences as predicted by NLRtracker. Branches predicted to correspond to major nucleotide-binding and leucine-rich repeat receptor (NLR) required for cell death (NRC) helper and sensor clades (NRC-H, NRC-S) were highlighted based on phylogenetic placement of NRC0/1 (helpers, purple) and Hero-A, Rpi-amr3i, and Bs2 (sensors, green), respectively. Tips linked to CNLs containing integrated domains are labeled with yellow dots. The purple phylogenetic tree (right) includes only sequences from the indicated NRC-H lineage (left), underlining the Ipomoea batatas, I. trifida, I. triloba, and I. littoralis sequences phylogenetically predicted as helper NLRs.

5
17
1,113
Lina Quesada at The IR-4 Project retweeted
The IR-4 Project@IR4_ProjectFeb 23
Lina Quesada-Ocampo has been named the new executive director of IR-4, effective March 9. Read more about her and the appointment: ncst.at/wynM50Ykx5M
2
9
433
Big news! I’m the new Executive Director of the @IR4_Project Proud to help lead this national effort serving specialty crop growers across the U.S. Pathogens, insects, and weeds better watch out! I’m coming for them all 😁 cals.ncsu.edu/news/lina-ques…

Lina Quesada-Ocampo Named Executive Director of the IR-4 Project

The IR-4 Project's new leader brings over 15 years of experience in applied pest management research and Extension work to her new role.

cals.ncsu.edu
1
4
26
629
We have a new Field Program Manager in the lab! 🎉 Welcome Edinson Diaz, who will lead our field experiments to develop disease management solutions for NC vegetable growers. Thrilled to have him on the team! @NC_PSI @KellyJAvilaM @MPrietoTorres @Carlomatrax @sarah_m_cochran
1
7
394
🎁 On the 12th day of Christmas, my lab gave to me… ✨ Gratitude, teamwork, and holiday cheer ✨ Wishing everyone happy holidays and a wonderful New Year from the Quesada Lab! 🎄🍠✨ @KellyJAvilaM @MPrietoTorres @sarah_m_cochran @Carlomatrax @NC_PSI @NCExtension
10
447
🎁 On the 11th day of xmas my lab gave to me… ✨ A diagnostic guide for sour rot of sweetpotato! 🍠🔬 Our new diagnostic guide provides practical tools to identify Geotrichum candidum and support better postharvest management @NC_PSI @KellyJAvilaM apsjournals.apsnet.org/doi/1…

Diagnostic Guide for Geotrichum Sour Rot of Sweetpotato | Plant Health Progress

Sour rot of sweetpotato, caused by Geotrichum candidum (Link, 1809), is an emerging postharvest disease that reduces root quality and storage life. Although G. candidum affects a wide range of crops,...

apsjournals.apsnet.org
1
3
270
🎁 On the 10th day of xmas my lab gave to me… 🪰✨ New insight into insect-driven spread of sweetpotato black rot! 🍠 Even low fly populations can spread sweetpotato black rot in storage @NC_PSI @KellyJAvilaM @NCExtension apsjournals.apsnet.org/doi/a…

Fly Density Does Not Limit Ceratocystis fimbriata Transmission to Sweetpotato by Drosophila hydei,...

Insect vectors are increasingly recognized as overlooked drivers of postharvest disease spread. Ceratocystis fimbriata, the causal agent of sweetpotato black rot, can spread rapidly in postharvest...

apsjournals.apsnet.org
1
5
247
🎁 On the 9th day of xmas my lab gave to me... 🍠 Fungicide timing insights! Field applications for black rot can stay within key export residue limits while supporting disease management. Science that protects yields and markets. 🌱 @NC_PSI @Jack_Masca apsjournals.apsnet.org/doi/1…

Impact of Fungicide Applications on Sweetpotato Roots and Slips for Managing Black Rot Disease...

North Carolina is the top producer of sweetpotatoes in the United States and accounts for more than 50% of the nation’s yearly production. The presence of fungal pathogens such as Ceratocystis...

apsjournals.apsnet.org
6
331
Load more