SAES-422 Multistate Research Activity Accomplishments Report
Sections
Status: Approved
Basic Information
- Project No. and Title: NE2338 : Weed Emergence in a Changing Climate
- Period Covered: 10/01/2023 to 09/30/2024
- Date of Report: 03/10/2025
- Annual Meeting Dates: 01/07/2025 to 01/07/2025
Participants
Annual meeting: January 7, 2025 Philadelphia, PA Attendees: Antonio DiTommaso, Cornell University Mark vanGessel, University of Delaware Carolyn Lowry, Penn State Maria Gannett, University of Massachussetts Thierry Besancon, Rutgers
Start in Spring 2025
Till land - seed in 300 seeds; gently rake in & cover with soil seed soil depth 1:
Scott will contact Caroyln's technician David Dong about latest design for OTC. David long can discuss stakes to hold OTC in place
The experiment will have four blocks. Each block will have one control and one OTC plot.
Rutgers: 4 blocks
Delaware: 4 blocks
UMass: 4 blocks
Cornell: 8 blocks (2 sites) [update: maybe 3 blocks if we have enough material]
Soil moisture sensors in top 5 cm of soil
Plastic tube (black) to protect wires (rodent hewing protection)
Light measurement ("dots")?
Mark vanGessel and Thierry will irrigate (sprinkle system)
Count target weeds each week and remove all weeds including non-targets after data collection each week
Katreina Chea tested OTC: no difference in soil moisture between OTC and control.
Species:
- Velvetleaf
- Lambsquarters
- Large crabgrass
- Foxtail
- Bur cucumber?
- ivyleaf morningglory?
Move plots each year but in same general area
Light quantity and quality
1m square plots; sample middle 1.2 square meter [or 1.4 sq meter]
Accomplishments
In the first year of this project, partners developed research plans for the upcoming several years, conducted some preliminary testing, and published on weed germination modeling.
Objective 1: Evaluate how weed emergence timing vary under ambient (control) and increased temperature conditions across multiple sites with different environmental conditions (NH, PA, NY, DE, NJ).
- Karina Chea at Penn State tested whether OTCs impacted soil moisture, and found no difference between OTC and control plots.
- Carolyn Lowry's lab at Penn State University tested herbivory in OTCs and controls, and found no significant difference between the treatment and control.
- Cornell laid the groundwork for next year's data collection efforts, and recruited Maria Gannett of Univerity of Massachussetts to join the multistate project.
- The multistate group developed sampling methods and protocols for 2025 (see meeting notes).
- Multistate partners published a review of weed emergence modeling methods: "Modeling weed seedling emergence for time-specific weed management: a systematic review", by Marschner et al, published in Weed Science https://www.cambridge.org/core/journals/weed-science/article/modeling-weed-seedling-emergence-for-timespecific-weed-management-a-systematic-review/51C2B94E7C8854BB2A0DC5B4F1C2C79D.
Impacts
Publications
C A Marschner, I Colucci, R S Stup, A S Westbrook, C A C G Brunharo, A DiTommaso, M B Mesgaran. 2024. Modeling weed seedling emergence for time-specific weed management: a systematic review. Weed Science, 72(4) 313 - 329, DOI: https://doi.org/10.1017/wsc.2024.25