Canada

Smooth sowthistle (common sowthistle, milk thistle, annual sow-thistle)

Sonchus oleraceus

Annual, lactiferous, seed-propagated weed with strong, cone-shaped taproot. S. oleraceus produces latex and is a preferred feed for birds, chicken and geese.
Flower heads light yellow to greenish yellow (Sonchus arvensis: intensive yellow). Leaves and stems contain milky sap. Soft, floppy, shiny, greasy, bluegreen leaves.
Young Plant: Round, often flatly sinuate in front, light green, entire, petiolate.
Stems: Erect, thick, ramified, up to 80 cm-100 cm (2.62 - 3.28 ft) high.
Leaves: First leaves nearly circular, with fine teeth; following leaves runcinate-pinnatifid or undivided, soft, blue-green, enclosing the stalk sagittately, prickly dentate.

Pesticides
2,4-D Amine 600
intensity: ★★★
2,4- D Ester 700
intensity: ★★★
Accurate
intensity: ★★★
Agri Star 2,4-D Ester 700
intensity: ★★★
Albaugh 2,4-D Amine 600
intensity: ★★★
Albaugh 2,4-D Amine 600 Liquid
intensity: ★★★
Alion
intensity: ★★★
Blackhawk
intensity: ★★★
Carnival 540
intensity: ★★★
Cheminova Glyphosate
intensity: ★★★
Cheminova Glyphosate II
intensity: ★★★
Clearout 41 Plus
intensity: ★★★
Converge Flexx
intensity: ★★★
Converge Pro Suspension
intensity: ★★★
Credit 360
intensity: ★★★
Credit 45
intensity: ★★★
Credit Plus
intensity: ★★★
Credit Xtreme
intensity: ★★★
Curtail M
intensity: ★★★
Cycle
intensity: ★★★
Depose
intensity: ★★★
Devrinol 10-G
intensity: ★★★
Devrinol 2-G Ready-to-use
intensity: ★★★
Durango
intensity: ★★★
Estaprop XT
intensity: ★★★
Flaxmax
intensity: ★★★
Flexstar GT
intensity: ★★★
Frontline 2,4-D XC A
intensity: ★★★
Frontline 2,4-D XC B
intensity: ★★★
GF-2018
intensity: ★★★
GF-772
intensity: ★★★
Glyfos Bio
intensity: ★★★
Glyfos Bio 450
intensity: ★★★
Glyfos Soluble Concentrate
intensity: ★★★
Glyfos Soluble Concentrate II
intensity: ★★★
Glyphos AU Soluble Concentrate
intensity: ★★★
Glyphosate 480
intensity: ★★★
Glyphosate-Trimesium 480
intensity: ★★★
Indaziflam 200 SC
intensity: ★★★
Indaziflam 500 SC
intensity: ★★★
Infinity
intensity: ★★★
Lexone DF Toss-N-Go
intensity: ★★★
Maverick II
intensity: ★★★
MON 76429 Liquid
intensity: ★★★
MON 76431 Liquid
intensity: ★★★
MON 76669 Liquid
intensity: ★★★
MON 78027
intensity: ★★★
MON 79791 Liquid
intensity: ★★★
MON 79828 Liquid
intensity: ★★★
Navius
intensity: ★★★
Navius VM
intensity: ★★★
NuGlo
intensity: ★★★
Powermax Liquid
intensity: ★★★
PP-Q52-105
intensity: ★★★
PSABRY
intensity: ★★★
R/T 540 Liquid
intensity: ★★★
Renegade HC Liquid
intensity: ★★★
Restore B
intensity: ★★★
Restore II
intensity: ★★★
Roundup Transorb HC Liquid
intensity: ★★★
Roundup Transorb Liquid
intensity: ★★★
Roundup Transorb Max Liquid
intensity: ★★★
Roundup Ultra 2 Liquid
intensity: ★★★
Roundup Ultra Liquid
intensity: ★★★
Roundup WeatherMAX With Transorb 2 Technology Liquid
intensity: ★★★
Roundup Xtend with VaporGrip Technology
intensity: ★★★
RRRPSABRY
intensity: ★★★
SC547
intensity: ★★★
Sencor 480 F
intensity: ★★★
StartUp
intensity: ★★★
Target DS
intensity: ★★★
Touchdown IQ
intensity: ★★★
Triton C 75 DF
intensity: ★★★
Truvist
intensity: ★★★
Velocity 2
intensity: ★★★
Velocity m3 All-In-One
intensity: ★★★
VisionMAX
intensity: ★★★
2,4-D Amine 500
intensity: ★★
2,4-D BEE-4
intensity: ★★
2,4-D LV-600
intensity: ★★
2,4-D LV-700
intensity: ★★
Accurate WSB
intensity: ★★
Baseline A
intensity: ★★
Benchmark A
intensity: ★★
Boost M
intensity: ★★
Devrinol 2-XT
intensity: ★★
Devrinol 50-DF
intensity: ★★
Enlist Duo
intensity: ★★
Florasulam l
intensity: ★★
GF-2654 TC
intensity: ★★
GF-2654 TSOY
intensity: ★★
GF-2726 TSOY
intensity: ★★
GoldWing
intensity: ★★
Guardsman Glyphosate
intensity: ★★
MCPA Amine
intensity: ★★
MCPA Amine 600
intensity: ★★
MCPA DMA 500
intensity: ★★
MCPA Ester 600
intensity: ★★
MCPA-K
intensity: ★★
MCPA Sodium 300
intensity: ★★
Prep II
intensity: ★★
Pyro
intensity: ★★
ReadySet SC
intensity: ★★
Rexade B
intensity: ★★
Spitfire 50 SC
intensity: ★★
Tropotox Plus 400
intensity: ★★
Accord Dry Flowable
intensity: ★
Agri Star MCPA DMA 500
intensity: ★
Albaugh MCPA Ester 600 Liquid
intensity: ★
Ally 20 SG
intensity: ★
Ally Herbicide Dry Flowable 60
intensity: ★
Ally Herbicide Toss-N-Go
intensity: ★
Arsenal
intensity: ★
Broadband
intensity: ★
Facet L
intensity: ★
Florasulam II
intensity: ★
Florasulam WDG
intensity: ★
Formula 40 C
intensity: ★
Frontline A
intensity: ★
Frontline B
intensity: ★
Frontline I
intensity: ★
GF-1352
intensity: ★
Metsulfuron Methyl EUP
intensity: ★
Metsulfuron Methyl EUP Toss-N-Go
intensity: ★
Plus M Ester 600
intensity: ★
PrePass 250 WG
intensity: ★
PrePass A
intensity: ★
PrePass B
intensity: ★
Retain B
intensity: ★
Arsenal Powerline
intensity: N/A
Attain A
intensity: N/A
Attain B
intensity: N/A
Attain XC A
intensity: N/A
Chaperone
intensity: N/A
Classic 25 DF
intensity: N/A
Classic Grande
intensity: N/A
Clearview
intensity: N/A
Clopyralid
intensity: N/A
Conquest A Herbicide Tank Mix
intensity: N/A
Conquest B
intensity: N/A
Crush'R 480
intensity: N/A
Crush'R Plus
intensity: N/A
Define DF
intensity: N/A
Deploy 75 DF
intensity: N/A
DPX-MAT 28
intensity: N/A
DPX-R9674 50 SG
intensity: N/A
Express Toss-N-Go Dry Flowable 75
intensity: N/A
Flaxmax Herbicide Component of Tank Mix
intensity: N/A
Flufenacet 60 Water Dispersible Granular
intensity: N/A
Fluroxypyr 180
intensity: N/A
Fluroxypyr EC
intensity: N/A
Fluroxypyr WDG
intensity: N/A
FX
intensity: N/A
GF-2685
intensity: N/A
GF-871
intensity: N/A
GF2050
intensity: N/A
GlyKamba
intensity: N/A
GP
intensity: N/A
Impede
intensity: N/A
Maverick III
intensity: N/A
Milestone
intensity: N/A
Nuance
intensity: N/A
Nuance WSB
intensity: N/A
Nufarm Fluroxypyr
intensity: N/A
Nufarm Glyphosate 360
intensity: N/A
Nufarm Spike 75
intensity: N/A
Perimeter
intensity: N/A
Perimeter II
intensity: N/A
Polaris
intensity: N/A
PP-3317
intensity: N/A
PrePass 480
intensity: N/A
Prestige A
intensity: N/A
Prestige B
intensity: N/A
Reclaim II A
intensity: N/A
Reclaim II B
intensity: N/A
Refine Extra 75 DF
intensity: N/A
Refine SG
intensity: N/A
Refine SG Toss-N-Go
intensity: N/A
Restore A
intensity: N/A
Salute B
intensity: N/A
Sencor 500 Flowable
intensity: N/A
Sencor Solupak
intensity: N/A
Sentrallas
intensity: N/A
Sightline A
intensity: N/A
Signal F
intensity: N/A
Traxos Two Broadleaf Component
intensity: N/A
Tribenuron Methyl EUP DF 75
intensity: N/A
Vantage
intensity: N/A
Vantage MAX
intensity: N/A
Vantage Plus
intensity: N/A
Vantage Plus MAX
intensity: N/A
Velocity A (A Component of Velocity M3 Herbicide Tank Mix)
intensity: N/A
Velocity B (A Component of Velocity M3 Herbicide Tank Mix)
intensity: N/A
Vios G3
intensity: N/A
VP480
intensity: N/A