Canada

Spotted ladysthumb (redshank, lady’s-thumb)

Polygonum persicaria (Persicaria maculosa)

Annual, seed-propagated weed with ramified taproot.
Ocrea with small hairs emerging from the upper end.
Characteristic purple splotch in the center of the leaf. The spot is not always present but typical.
The perianth is somewhat variable in color.
Cotyledons: Long-oval, rounded tip, dark green to reddish.
Stems: Similar to Pale persicaria (Persicaria lapathifolium), up to 80 cm (31.49 inch) high.
Leaves: Lanceolate, widest in the middle, upper surface often with dark spots, short-petiolate or sessile.
Membranous tubes at the leaves' base often with short, appressed hairs.
Visibly ciliate at the margin.

Pesticides
Aatrex Liquid 480
intensity: ★★★
AC 299,263 70 WDG
intensity: ★★★
Accurate
intensity: ★★★
Accurate WSB
intensity: ★★★
Acuron
intensity: ★★★
Ally 20 SG
intensity: ★★★
Ally Herbicide Dry Flowable 60
intensity: ★★★
Ally Herbicide Toss-N-Go
intensity: ★★★
Approve
intensity: ★★★
Banvel 483
intensity: ★★★
Banvel
intensity: ★★★
Banvel Dry Eg
intensity: ★★★
BASF Pyramin DF
intensity: ★★★
Benchmark B
intensity: ★★★
Blazer
intensity: ★★★
Boost M
intensity: ★★★
Broadband
intensity: ★★★
Buctril M
intensity: ★★★
Callisto GT
intensity: ★★★
Carnival 540
intensity: ★★★
Cheminova Glyphosate
intensity: ★★★
Cheminova Glyphosate II
intensity: ★★★
Clearout 41 Plus
intensity: ★★★
Clearview
intensity: ★★★
Command 360 ME
intensity: ★★★
Compas 480 EC
intensity: ★★★
Credit 360
intensity: ★★★
Credit 45
intensity: ★★★
Credit Plus
intensity: ★★★
Credit Xtreme
intensity: ★★★
CS-100-2525
intensity: ★★★
CS-100-3317
intensity: ★★★
Cycle
intensity: ★★★
DB-1254
intensity: ★★★
DB-6654
intensity: ★★★
DB-8454
intensity: ★★★
Deploy 75 DF
intensity: ★★★
Deploy WDG
intensity: ★★★
Depose
intensity: ★★★
Dicamba L
intensity: ★★★
Distinct WDG
intensity: ★★★
DPX-R9674 50 SG
intensity: ★★★
Eclipse II A
intensity: ★★★
Eclipse II B
intensity: ★★★
Eclipse III A
intensity: ★★★
Eclipse III B
intensity: ★★★
Enforcer D
intensity: ★★★
Etho SC
intensity: ★★★
Express PRO
intensity: ★★★
Flexstar GT
intensity: ★★★
Frontier Max Plus
intensity: ★★★
Frontline 2,4-D XC A
intensity: ★★★
Frontline 2,4-D XC B
intensity: ★★★
Gesagard 480SC
intensity: ★★★
GF-2018
intensity: ★★★
GF-772
intensity: ★★★
GF2050
intensity: ★★★
Glyfos Bio
intensity: ★★★
Glyfos Bio 450
intensity: ★★★
Glyfos Soluble Concentrate
intensity: ★★★
Glyfos Soluble Concentrate II
intensity: ★★★
GlyKamba
intensity: ★★★
Glyphos AU Soluble Concentrate
intensity: ★★★
Glyphosate 480
intensity: ★★★
Glyphosate-Trimesium 480
intensity: ★★★
GP
intensity: ★★★
Guardsman Glyphosate
intensity: ★★★
Halex GT
intensity: ★★★
Harmony Broadleaf
intensity: ★★★
Imazethapyr 240 SL
intensity: ★★★
Lexone DF Toss-N-Go
intensity: ★★★
Liberty 150 SN
intensity: ★★★
Liberty 150 SN Herbicide and Crop Desiccant MP
intensity: ★★★
Liberty 200 SN
intensity: ★★★
Lumax EZ
intensity: ★★★
M6316 SG
intensity: ★★★
Marksman
intensity: ★★★
Maverick II
intensity: ★★★
Metsulfuron Methyl EUP
intensity: ★★★
Metsulfuron Methyl EUP Toss-N-Go
intensity: ★★★
Mextrol 450
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: ★★★
Nimble
intensity: ★★★
Nimble WSB
intensity: ★★★
Nortron
intensity: ★★★
Nortron EC
intensity: ★★★
Nu-Image
intensity: ★★★
Nufarm Boost
intensity: ★★★
NuGlo
intensity: ★★★
Overdrive
intensity: ★★★
Pardner
intensity: ★★★
Peak 75WG
intensity: ★★★
Pinnacle SG
intensity: ★★★
Pinnacle SG TOSS-N-GO
intensity: ★★★
Pinnacle Soybean SG
intensity: ★★★
Pinnacle Toss-N-Go
intensity: ★★★
Polaris
intensity: ★★★
Powermax Liquid
intensity: ★★★
PP-23235
intensity: ★★★
PP-2525
intensity: ★★★
PP-2525 Toss-N-Go
intensity: ★★★
PP-31155
intensity: ★★★
PP-3317
intensity: ★★★
PP-Q50-882
intensity: ★★★
PP-Q52-105
intensity: ★★★
Predicade Broadleaf
intensity: ★★★
Primextra II Magnum
intensity: ★★★
Princep Nine-T
intensity: ★★★
Pursuit
intensity: ★★★
Pursuit 70 DG
intensity: ★★★
Pyramin FL
intensity: ★★★
R/T 540 Liquid
intensity: ★★★
Refine
intensity: ★★★
Refine Extra 75 DF
intensity: ★★★
Refine Extra 75 Toss-N-Go
intensity: ★★★
Refine SG
intensity: ★★★
Refine SG Toss-N-Go
intensity: ★★★
Reflex
intensity: ★★★
Reliance STS Toss-N-Go
intensity: ★★★
Renegade HC Liquid
intensity: ★★★
Retain A
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: ★★★
Rustler Liquid
intensity: ★★★
SC547
intensity: ★★★
Sencor 480 F
intensity: ★★★
Sencor 480 Soybean Flowable
intensity: ★★★
Sencor 500 Flowable
intensity: ★★★
Sencor 75 DF
intensity: ★★★
Sencor 75 DF Peas Sprayule 75 Water Dispersible Granular
intensity: ★★★
Sencor Solupak
intensity: ★★★
Sentrallas
intensity: ★★★
Sightline A
intensity: ★★★
Simadex Simazine Flowable
intensity: ★★★
Sportcoat
intensity: ★★★
StartUp
intensity: ★★★
Target
intensity: ★★★
Target DS
intensity: ★★★
Thumper
intensity: ★★★
Touchdown 480 Liquid
intensity: ★★★
Touchdown IQ
intensity: ★★★
Touchdown Total
intensity: ★★★
Travallas
intensity: ★★★
Traxion
intensity: ★★★
Tricor 75 DF
intensity: ★★★
Tricor 75 WSB
intensity: ★★★
Tricor Mx
intensity: ★★★
Triton C
intensity: ★★★
Triton C 75 DF
intensity: ★★★
Truvist
intensity: ★★★
VisionMAX
intensity: ★★★
XtendiMax with VaporGrip Technology
intensity: ★★★
2,4-D Amine 500
intensity: ★★
2,4-D LV-700
intensity: ★★
Broadstrike RC
intensity: ★★
Flumetsulam 80 WDG WSP
intensity: ★★
Optica Trio
intensity: ★★
Albaugh MCPA Ester 600 Liquid
intensity: N/A
Armezon Pro
intensity: N/A
Attain A
intensity: N/A
Attain B
intensity: N/A
Attain XC A
intensity: N/A
Baseline A
intensity: N/A
Benchmark A
intensity: N/A
BRY/MAE 2 (A Component of RRR/BRY/MAE Herbicide Tank Mix)
intensity: N/A
Clopyralid
intensity: N/A
Conquest A Herbicide Tank Mix
intensity: N/A
Conquest B
intensity: N/A
Converge 75 WDG
intensity: N/A
Converge Flexx
intensity: N/A
Converge Pro Suspension
intensity: N/A
Define DF
intensity: N/A
Dual Magnum Soybean
intensity: N/A
Durango
intensity: N/A
Dycleer Agricultural
intensity: N/A
Elim EP 25
intensity: N/A
Elim SG Toss-N-Go
intensity: N/A
Engenia
intensity: N/A
Eptam 8-E
intensity: N/A
Eragon
intensity: N/A
Eragon LQ
intensity: N/A
Estaprop XT
intensity: N/A
Express LW
intensity: N/A
Express SG
intensity: N/A
Express Toss-N-Go
intensity: N/A
Express Toss-N-Go Dry Flowable 75
intensity: N/A
Fexapan Plus Vaporgrip Technology
intensity: N/A
FirstStep
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
Frontier Max
intensity: N/A
FX
intensity: N/A
Glean
intensity: N/A
Impact
intensity: N/A
Integrity
intensity: N/A
Lexone DF
intensity: N/A
M1691
intensity: N/A
NC-00439
intensity: N/A
NC-0050
intensity: N/A
Nuance
intensity: N/A
Nuance Pro
intensity: N/A
Nuance WSB
intensity: N/A
Nufarm Fluroxypyr
intensity: N/A
Optill
intensity: N/A
Perimeter
intensity: N/A
Perimeter II
intensity: N/A
Prism 25
intensity: N/A
Prowl H2O
intensity: N/A
Reclaim II A
intensity: N/A
Reclaim II B
intensity: N/A
RRR 1 (A Component of RRR/BRY/MAE Herbicide Tank Mix)
intensity: N/A
Sencor DF Soybean
intensity: N/A
Sencor for Soybeans
intensity: N/A
Signal F
intensity: N/A
Syna16003
intensity: N/A
Thumper Total 1 (A Component of Thumper Total Herbicide Tank Mix)
intensity: N/A
Thumper Total 2 (A Component of Thumper Total Herbicide Tank Mix)
intensity: N/A
Traxos Two Broadleaf Component
intensity: N/A
Vios G3
intensity: N/A