#weedscience — Public Fediverse posts

New paper out in *New Zealand Plant Protection* 🌾

Buddenhagen CE et al. (2026) report AHAS‑inhibitor herbicide resistance in recent Alopecurus myosuroides (black‑grass) incursions into New Zealand.

Two incursion‑linked seed lots were tested. One showed very high resistance (>10× the label rate to achieve 90% control), while the other showed reduced sensitivity. This indicates that AHAS‑inhibitor herbicides should not be used for black‑grass incursion responses in New Zealand.

Given the widespread evolution of resistance overseas, future incursions are increasingly likely to carry resistance traits. Strong border biosecurity, certified seed, avoiding seed from infested regions, and early resistance screening are critical.

https://doi.org/10.30843/nzpp.2026.79.11801

#WeedScience #HerbicideResistance #Biosecurity #BlackGrass #PlantProtection #NZScience #NZPPS

Our open access paper just came out in #NeoBiota.

Biosecurity risks from weed seeds in crop seed imported into Canada: prevalence, trends and herbicide resistance.

Lead author Jesse Rubenstein's efforts brought Lincoln University, SIRC and AgResearch scientists together to examine Canadian seed inspection data. He led similar work for NZ, which was published earlier.

🔗 DOI link: https://doi.org/10.3897/neobiota.103.163919

Overview: We analysed twelve years (2007–2019) of Canadian Food Inspection Agency monitoring data for more than 2,000 randomly sampled seed lots imported from the United States. Of the hundreds of contaminant species recorded, 70% were introduced in Canada, 23% were native, and 7% were previously unrecorded (absent) in Canada. Contaminants with a known history of herbicide resistance in the USA but not in Canada increased significantly over time (e.g., Sorghum halepense, Poa annua). Noxious weeds declined across the study period and were reported significantly less frequently than non-noxious weeds, while entry-prohibited species were rare, limited to four records of Cuscuta spp. We identified 14 weed species absent from Canada, with Trifolium vesiculosum the most common, while Chenopodium album was the most widespread across crop species. Regulatory concerns include the import of crops also classified as noxious or problematic weeds (Bromus tectorum, Poa annua), permitting contaminants absent from Canada in seed lots, and the dual classification of species that are native but also entry-prohibited (Cuscuta campestris). Our study underscores the need for continued monitoring, risk assessment, and adaptive regulation to protect agriculture and biodiversity while accommodating global seed trade.

We’d be glad to hear your thoughts, and please do share with anyone who might find it interesting. #IAS #biosecurity #weeds #weedscience

💧 Curious how water pipes make your smoke smoother?
We dive deep into the physics of smoke cooling — how percolation, diffusion, and heat transfer work together for that perfect hit. 💨

🔗 Read here: https://justpaste.it/2uxg7

#CannabisEducation #WeedScience #SmokeTech #420Culture #ICGlass #BongPhysics

Weeds are amazing. #photography #plants #weeds #weedscience

Not all plants are weeds. Not all introduced species are invasive. And even the so called 'notorious' invasives support native wildlife in the ecologically disturbed habitats of our great cities.

📸 30 MAR 2023 (11:49 hrs.) near #mulund East, #mumbai.

#naturalhistory #MumbaiUnseen #wildlife #invasiveplants #invasives #weedscience

Dandelion, refracted. I like this one because it shows an 'old' flower that almost appears to be dreaming of younger days, with the full-bloom flower refracted through the water droplet. I think it might be one of my favorite photos I've ever taken. (though still some technical aspects I'd like to improve upon...) #PhotoMonday #photography #macro #flowers #reflection #water #WSSA23 #weeds #weedscience

Musk thisle at sunset. #photography #PhotoMonday #WSSA23 #landscape #sunset #flowers #weeds #weedscience

On the other hand this global trade in seed carries some biosecurity risks.

#PLOSONE: The phytosanitary risks posed by seeds for sowing trade networks
#IAS #weedscience
https://dx.plos.org/10.1371/journal.pone.0259912

I'm going to try to make #WeedyWednesday a thing, in an effort to more regularly post something interesting about #weedscience. For the inaugural thread, I'm going to discuss one of my favorite areas of research that I and my students have been working on for ~10 years: shade avoidance.
#plants #plantscience #agriculture #weeds

Great discussion this morning at the annual meeting of the "Arable Weeds and Management in Europe" database. It's lovely to see a group of weed researchers engaged in data sharing and finding new ways to make their survey data more findable and usable by others.

If you don't know about AWME there's some more info here:
https://www.ewrs.org/en/info/Blog/93/Arable-Weeds-and-Management-in-Europe-AWME-A-database-of-weed-survey-data-from-across-Europe

We'd love for more people to get involved

#AWME #FAIRdata #DataScience #WeedSurveys #WeedEcology #WeedScience

Great discussion this morning at the annual meeting of the "Arable Weeds and Management in Europe" database. It's lovely to see a group of weed researchers engaged in data sharing and finding new ways to make their survey data more findable and usable by others.

If you don't know about AWME there's some more info here:
https://www.ewrs.org/en/info/Blog/93/Arable-Weeds-and-Management-in-Europe-AWME-A-database-of-weed-survey-data-from-across-Europe

We'd love for more people to get involved

#AWME #FAIRdata #DataScience #WeedSurveys #WeedEcology #WeedScience

Great discussion this morning at the annual meeting of the "Arable Weeds and Management in Europe" database. It's lovely to see a group of weed researchers engaged in data sharing and finding new ways to make their survey data more findable and usable by others.

If you don't know about AWME there's some more info here:
https://www.ewrs.org/en/info/Blog/93/Arable-Weeds-and-Management-in-Europe-AWME-A-database-of-weed-survey-data-from-across-Europe

We'd love for more people to get involved

#AWME #FAIRdata #DataScience #WeedSurveys #WeedEcology #WeedScience

Great discussion this morning at the annual meeting of the "Arable Weeds and Management in Europe" database. It's lovely to see a group of weed researchers engaged in data sharing and finding new ways to make their survey data more findable and usable by others.

If you don't know about AWME there's some more info here:
https://www.ewrs.org/en/info/Blog/93/Arable-Weeds-and-Management-in-Europe-AWME-A-database-of-weed-survey-data-from-across-Europe

We'd love for more people to get involved

#AWME #FAIRdata #DataScience #WeedSurveys #WeedEcology #WeedScience

#introduction post:

I study weeds! I'm a professor of #weedscience, mostly working in small-ish acreage crops like sugar beet and dry edible beans. My research interests include how plants interact with each other, and evaluating the impacts of weed management practices (like herbicide use). I'm an avid #Rstats user.

I enjoy #photography, especially landscapes and #macro. I spend a lot of my work time AND my free time looking at plants. I've been told I swear a lot.

I'm currently running some simulations to explore how effective #IntegratedWeedManagement systems from one part of Europe might translate into different #agriculturalSystems elsewhere
#IWM #IPM #WeedScience #ProcessBasedModelling #AgriculturalModelling #Agriculture

I'm currently running some simulations to explore how effective #IntegratedWeedManagement systems from one part of Europe might translate into different #agriculturalSystems elsewhere
#IWM #IPM #WeedScience #ProcessBasedModelling #AgriculturalModelling #Agriculture

I'm currently running some simulations to explore how effective #IntegratedWeedManagement systems from one part of Europe might translate into different #agriculturalSystems elsewhere
#IWM #IPM #WeedScience #ProcessBasedModelling #AgriculturalModelling #Agriculture

@hmetcalfe cool! We are starting to populate #mastodon with #weedscience let’s try to bring more of us here!