Charles Geddes
@charlesmgeddes
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AAFC Weed Scientist, dad, husband, farm boy. Interested in herbicide-resistant plants, weed ecology, cropping systems & IWM. Opinions & tweets are my own.
Lethbridge, Alberta
Joined August 2010
Dr Kui Liu @Ag_KuiLiu from @AAFC_Canada Swift Current is recruiting a https://t.co/5ehvzu3ypS. student in Agronomy. Research Topic: Resource use efficiency of ongoing 10-year crop rotations https://t.co/DqNaPGe4xo
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Update: Genetic tests provide new insight into the distribution of Group 14-resistant kochia. Samples continue to arrive. Thanks to everyone who submitted samples! Stay tuned for the complete story this winter.
Update: Genetic testing identifies Group 14-resistant kochia at 13 more sites (so far) across the Canadian Prairies and in all three Prairie Provinces. Stay tuned for complete updates this fall/winter…
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Field agronomy research using drones to estimate crop nitrogen shows how UAV remote sensing delivers scalable, non-destructive insights, advancing precision agriculture and sustainable farming adoption. Thanks to @RDARAlberta and @AAFC_Canada for support!
topcropmanager.com
Drones offer a faster, more affordable way to measure in-crop nitrogen.
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Come join the fun this Monday! Looking forward to discussing strategies to control troublesome herbicide-resistant weeds like kochia, wild oat, waterhemp and Canada fleabane, among others.
LIVE! This Monday on The Agronomists at 8 PM E! Host @RealLoudLyndsey is joined by guests @psikkema1 of @RidgetownCampus & @charlesmgeddes of @AAFC_Canada, to unpack how to kill stubborn weeds! Tune in and bring your questions: https://t.co/TzuVFYCvob
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Hi folks! @WorldofWeeds runs a survey to track troublesome and common weeds in different crops. This year is for broadleaf crops including canola, alfalfa, pulses, etc. Agronomists and industry folks, your input would be appreciated!
📣 Only 1 week left to complete the 2025 Weed Survey! 📋 Share your top troublemakers in broadleaf crops, hemp, fruits & veggies across the U.S. & Canada. 🗓️ Deadline: Sept 1 🔗 https://t.co/r5L7StdNSi
#WSSA #weedscience #weedsurvey
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Update: Genetic testing identifies Group 14-resistant kochia at 13 more sites (so far) across the Canadian Prairies and in all three Prairie Provinces. Stay tuned for complete updates this fall/winter…
Is your kochia Group 14-resistant? Find out for free! Help us validate our new genetic test by submitting leaf tissue. This year we have an open call for testing Group 14 resistance in kochia across AB/SK/MB. Contact me for a free sample submission kit. https://t.co/X12PLd0llT
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Trying to get an idea of where kochia has spread to in the Prairies. If you've got kochia, especially a newer problem, we'd love if you would upload your observation to iNaturalist so we can get a feel just how far it's moved! Please retweet! Project here: https://t.co/NKsImb8kTF
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Yesterday, @charlesmgeddes gave us a hands-on look at his team's easy-to-use sample kit to test for herbicide resistance in kochia! Answer his open call to receive your test & discover if your kochia has Group 14 resistance!
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We are conducting a survey of uncontrolled weeds in winter wheat and early-seeded spring wheat (or durum) fields in Saskatchewan. Please contact me if you are interested in participating or learning more.
Which weeds escape management in winter wheat and early-seeded spring wheat? We are seeking volunteers from Saskatchewan with winter wheat or spring wheat (or durum) fields seeded before April 15th for a survey of uncontrolled weeds. Fields visited in July/August.
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Kits are almost all gone, but supplies for 100 more will be arriving next week. Let me know if you want to take advantage of free testing this year. Knowing your enemy gives you the upper hand in the battle against herbicide-resistant weeds!
Is your kochia Group 14-resistant? Find out for free! Help us validate our new genetic test by submitting leaf tissue. This year we have an open call for testing Group 14 resistance in kochia across AB/SK/MB. Contact me for a free sample submission kit. https://t.co/X12PLd0llT
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Now is the best time to sample. The test works best using green leaf tissue from actively growing weeds.
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Research funded by @westerngrains @AlbertaCanola @AlbertaPulse @mb_cropalliance @OatGrowers @SaskWheat @AlbertaGrains
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Is your kochia Group 14-resistant? Find out for free! Help us validate our new genetic test by submitting leaf tissue. This year we have an open call for testing Group 14 resistance in kochia across AB/SK/MB. Contact me for a free sample submission kit. https://t.co/X12PLd0llT
cdnsciencepub.com
Kochia (Bassia scoparia (L.) A.J. Scott) is a problematic tumbleweed that has been reported resistant to five herbicide sites-of-action. Recently, protoporphyrinogen oxidase (PPO) inhibitor-resistant...
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Which weeds escape management in winter wheat and early-seeded spring wheat? We are seeking volunteers from Saskatchewan with winter wheat or spring wheat (or durum) fields seeded before April 15th for a survey of uncontrolled weeds. Fields visited in July/August.
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Two populations of Group 14 resistant kochia confirmed in SK and AB https://t.co/5eZsrLzCCE research from @charlesmgeddes @ShaunSharpe9 Mattea Pittman and Julia Leeson
canadianagronomist.ca
Two grower submitted samples were confirmed to have Group 14 PPO inhibitor-resistant kochia from the RM of Newcombe in Saskatchewan and Forty Mile County in Alberta. Dose response bioassays confirmed...
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Lots of funders for this research https://t.co/1zji7WTUR8
@mb_cropalliance @SaskOilseeds @SaskPulse @SaskWheat @westerngrains @ADAMA_CAN @BASFCanada @Bayer4CropsCA @FMCAgCanada @GowanCo @ValentUSA @SKGov @AAFC_Canada
canadianagronomist.ca
Dose response bioassays confirmed high resistance to foliar applied Group 14 active ingredients saflufenacil and carfentrazone in a kochia population from Kindersley and two populations from North...
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@breannetidemann and I are on tour this week! Presenting today on herbicide resistance and IWM at the Weed Science Short Course in Winnipeg, then tomorrow on @mb_cropalliance funded research at their delegate meeting in Brandon.
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Our new weed scientist @IAStateWeedSci is looking for an M.S. and a PhD student! Reach out to him for details at weverman@iastate.edu! @WiscWeeds @Ryan_C_Hamberg @AmitUNL @UMNweeds @BillJohnson53 @ShowMeWeeds @UIWeedSci @TravisLegleiter @NDSUWeeds @lancasarah @WarAgainstWeeds
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