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Author: IR-4 Generic

2023 Environmental Horticulture Workshop

Posted on February 28, 2023October 18, 2023

The 2023 EHC Priority Setting Workshop was held October 10-12 in Little Rock, Arkansas.

Posted in Environmental Horticulture Program, EventsTagged 2023, environmental horticulture, events

2023 Food Use Workshop

Posted on February 28, 2023September 18, 2023

The 2023 Food Use Workshop was held September 12-14 in Raleigh, NC.

Posted in Events, Food Use

2023 Industry Technology Session

Posted on February 28, 2023September 18, 2023

The 2023 Industry Technology Session took place virtually on Thursday, July 20.

Posted in Events, Food UseTagged 2023, events, food use, industry technology session

2023 Event Dates: Industry Technology Session, Food Use Workshop, and EHC Workshop

Posted on February 27, 2023March 31, 2023 — Hannah Ross

Save these dates and stay tuned for more details!

Posted in Environmental Horticulture Program, Food Use, NewsTagged 2023, EHC, environmental horticulture, events, food use workshop, industry technology session, news, save the date

IR-4 Honors Outstanding Team Members with Awards at 2023 NEC

Posted on February 21, 2023March 12, 2026 — Hannah Ross

Employees honored with National Recognition of Excellence Awards, Technical and Meritorious Service Awards

Posted in NewsTagged 2023, blueberry, epa updates, food crop program, food crops, food use, ir-4, ir-4 project, specialty crops, sulfur dioxide

Tolerance Success: Rimsulfuron

Posted on February 15, 2023

Rimsulfuron was registered for use on pomegranate, as well as on crops from subgroup 23A (tropical and subtropical, small fruit, edible peel).

Posted in Food Use, Tolerance Success

The IR-4 Project Commemorates 60 Years of Impact

Posted on February 7, 2023February 7, 2023 — Hannah Ross

2023 marks 60 Years of IR-4. Read more about our project’s impacts and longevity.

Posted in NewsTagged 2023, 60yearsofIR4, ir-4, ir-4 project, news, pressrelease, specialty crops

Cooperative Effort Yields Powdery Mildew Control Product for Greenhouse Vegetables

Posted on February 2, 2023February 3, 2023 — David Kuack, Van Starner

EPA has approved new tolerances for Pyriofenone on greenhouse cucumbers and fruiting vegetables.

Posted in Food Use, New Registrations, News, Success Story, Tolerance SuccessTagged 2023, Canadian PMC, epa updates, final rule, food crop program, food crops, food use, greenhouse, Greenhouse Vegetables, ir-4, ir-4 project, PMC, powdery mildew, specialty crops

Beetle, Borer, Weevil & White Grub Efficacy – 2023

Posted on January 30, 2023April 23, 2024

Collectively, managing coleopteran insects can be challenging because the adult and larval stages may both cause damage and sometimes occur on different hosts or on different plant parts.

Posted in Efficacy, Entomology, Entomology Efficacy

EPA Approves Post-Harvest Tolerance for Blueberry Growers

Posted on January 23, 2023April 6, 2023 — Hannah Ross

EPA has approved a new tolerance for sulfur dioxide on blueberries. Read more here.

Posted in Food Use, News, Success StoryTagged 2023, blueberry, epa updates, food crop program, food crops, food use, ir-4, ir-4 project, specialty crops, sulfur dioxide

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Now Hiring: Study Director

2026 Food Use Workshop Orientation Webinar on August 6

Graphic showing that IR-4's 2026 Jerry Baron SOAR Award is now accepting nominations. Text and logo over an image of clover.

Nominations Open for the 2026 Jerry Baron SOAR Award

IR-4 Regional Field Coordinator Marylee Ross Retires After 35 Years Serving Northeast Region Growers

Image of colorful red, yellow, orange and green peppers

Registration Open for the 2026 Food Use Workshop

Keeping Mint Growing: IR-4’s Critical Role

IR-4 Project Headquarters
NC State University
1730 Varsity Drive
Venture IV, Suite 210
Raleigh, NC 27606
(919) 515-1552
ir-4_project@ncsu.edu

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This work is supported by project award nos. 2025-79111-45234 and 2022-79111-38469, from the U.S. Department of Agriculture’s National Institute of Food and Agriculture, with substantial cooperation and support from the State Agricultural Experiment Stations, USDA-ARS and USDA-FAS. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and should not be construed to represent any official USDA or U.S. Government determination or policy. In accordance with Federal Law and U.S. Department of Agriculture policy, this institution is prohibited from discriminating on the basis of race, color, national origin, sex, age or disability.

  • About IR-4
    • Annual Reports
    • Careers
    • Contacts
      • Headquarters Staff
      • National Directory
      • Regional Field Coordinators
    • History
    • Mission & Vision
    • News
    • Outreach
    • Participants in the Process
  • Food Crops
    • Biopesticide Regulatory Support Program
    • Crop Grouping
    • International Programs
    • Residue and Product Performance
  • Environmental Horticulture
  • Events & Training
  • Stakeholder Resources
    • Database: Food Crops
    • eQA/eDOCs
    • Database: Environmental Horticulture
    • Databases: Biopesticides and Organic Support
    • Glossary of Acronyms
    • Upload Files
  • Submit a Project Request