Canada

European stickseed (bluebur, bristly sheepbur)

Lappula squarrosa

It is native to Europe and Asia, where it is common, and it is an introduces species in much of North America and Africa. It is well known as a noxious weed where it is naturalized and also in many parts of its native range. This is an annual herb producing an erect stem often with sprays of many long, bending branches, its form varying in different regions and climates. The plant may approach a meter in height. The stems are lined with linear to oval leaves up to 5 centimeters long and coated in whitish hairs, and the herbage emits a scent generally considered unpleasant. The inflorescence  is a long, leafy raceme of tiny flowers near the ends of the branches. Each flower is 2 to 4 millimeters wide with five light blue corolla lobes. White-flowered plants are occasionally seen. The fruit is a cluster of four nutlets which are coated in hooked prickles. The seeds are dispersedwhen the prickles get caught on animal coats and human clothing, and when they are moved by wind.This plant grows easily in a wide range of habitat types, including agricultural fields, roadsides, gravel beds, and rocky waste places. It thrives in overgrazed pastures.

Pesticides
2,4-D Amine 500
intensity: ★★★
2,4-D Amine 600
intensity: ★★★
2,4-D BEE-4
intensity: ★★★
2,4-D Ester 700
intensity: ★★★
2,4- D Ester 700
intensity: ★★★
2,4-D LV-600
intensity: ★★★
2,4-D LV-700
intensity: ★★★
Accurate
intensity: ★★★
Accurate WSB
intensity: ★★★
Adrenalin SC
intensity: ★★★
Agri Star 2,4-D Ester 700
intensity: ★★★
Albaugh 2,4-D Amine 600
intensity: ★★★
Albaugh 2,4-D Amine 600 Liquid
intensity: ★★★
Ally 20 SG
intensity: ★★★
Ally Herbicide Dry Flowable 60
intensity: ★★★
Ally Herbicide Toss-N-Go
intensity: ★★★
Attain XC B
intensity: ★★★
Benchmark B
intensity: ★★★
Buctril M
intensity: ★★★
Clearview
intensity: ★★★
Compas 480 EC
intensity: ★★★
Enlist Duo
intensity: ★★★
Estaprop XT
intensity: ★★★
Formula 40 C
intensity: ★★★
Frontline 2,4-D XC A
intensity: ★★★
Frontline 2,4-D XC B
intensity: ★★★
GF-2654 TC
intensity: ★★★
GF-2654 TSOY
intensity: ★★★
GF-2726 TSOY
intensity: ★★★
GF2050
intensity: ★★★
MCPA Amine 600
intensity: ★★★
MCPA-K
intensity: ★★★
MCPA Sodium 300
intensity: ★★★
Metsulfuron Methyl EUP
intensity: ★★★
Metsulfuron Methyl EUP Toss-N-Go
intensity: ★★★
Mextrol 450
intensity: ★★★
Navius
intensity: ★★★
Navius VM
intensity: ★★★
OcTTain XL
intensity: ★★★
Pardner
intensity: ★★★
Restore B
intensity: ★★★
Restore II
intensity: ★★★
Retain B
intensity: ★★★
Rexade B
intensity: ★★★
Roundup Ultra Liquid
intensity: ★★★
Scuttle
intensity: ★★★
Sightline A
intensity: ★★★
Thumper
intensity: ★★★
Traxos Two Broadleaf Component
intensity: ★★★
Truvist
intensity: ★★★
Agri Star MCPA DMA 500
intensity: ★★
Boost M
intensity: ★★
Enforcer M
intensity: ★★
MCPA 2 EH Ester 600
intensity: ★★
MCPA Amine
intensity: ★★
MCPA DMA 500
intensity: ★★
MCPA Ester 500
intensity: ★★
MCPA Ester 500 LV
intensity: ★★
MCPA Ester 600
intensity: ★★
Albaugh MCPA Ester 600 Liquid
intensity: ★
Plus M Ester 600
intensity: ★
Stellar B
intensity: ★
Approve
intensity: N/A
Attain A
intensity: N/A
Attain B
intensity: N/A
Attain XC A
intensity: N/A
Badge II
intensity: N/A
Baseline A
intensity: N/A
Benchmark A
intensity: N/A
Blackhawk
intensity: N/A
Bromotril 11 240 EC
intensity: N/A
BRY/MAE 2 (A Component of RRR/BRY/MAE Herbicide Tank Mix)
intensity: N/A
Carnival 540
intensity: N/A
Credit 360
intensity: N/A
Credit 45
intensity: N/A
Credit Xtreme
intensity: N/A
Durango
intensity: N/A
Fluroxypyr 180
intensity: N/A
Fluroxypyr EC
intensity: N/A
Fluroxypyr WDG
intensity: N/A
FX
intensity: N/A
GF-2018
intensity: N/A
GF-772
intensity: N/A
GF-871
intensity: N/A
GlyKamba
intensity: N/A
Koril 235
intensity: N/A
Milestone
intensity: N/A
MON 76429 Liquid
intensity: N/A
MON 76431 Liquid
intensity: N/A
MON 76669 Liquid
intensity: N/A
MON 79791 Liquid
intensity: N/A
MON 79828 Liquid
intensity: N/A
Nufarm Fluroxypyr
intensity: N/A
Nufarm Glyphosate 360
intensity: N/A
NuGlo
intensity: N/A
Perimeter
intensity: N/A
Perimeter II
intensity: N/A
Polaris
intensity: N/A
Powermax Liquid
intensity: N/A
Reclaim II A
intensity: N/A
Reclaim II B
intensity: N/A
Renegade HC Liquid
intensity: N/A
Restore A
intensity: N/A
Roundup Transorb Liquid
intensity: N/A
RRR 1 (A Component of RRR/BRY/MAE Herbicide Tank Mix)
intensity: N/A
Sentrallas
intensity: N/A
Signal F
intensity: N/A
Spitfire 50 SC
intensity: N/A
Thrasher
intensity: N/A
Thrasher II
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