Canada

Sunflowers

Helianthus

Sunflowers are usually tall annuals, that grow to a height of 50–400 centimetres (20–157 in).
The rough and hairy stem is branched in the upper part in wild plants but is usually unbranched in domesticated cultivars. The petiolate leaves are dentate and often sticky. The lower leaves are opposite, ovate or often heart-shaped.
They bear one or several to many wide, terminal capitula (flower heads), with bright yellow ray florets at the outside and yellow or maroon (also known as a brown/red) disc florets inside. Several ornamental cultivars have red-colored ray florets; all of them stem from a single original mutant. During growth, sunflowers tilt during the day to face the sun, but stop once they begin blooming. This tracking of the sun in young sunflower heads is called heliotropism. By the time they are mature, sunflowers generally face east.
Helianthus species are used as food plants by the larvae of many lepidopterans.

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: ★★★
Adrenalin SC
intensity: ★★★
Albaugh 2,4-D Amine 600
intensity: ★★★
Albaugh 2,4-D Amine 600 Liquid
intensity: ★★★
Albaugh MCPA Ester 600 Liquid
intensity: ★★★
Attain XC B
intensity: ★★★
Blackhawk
intensity: ★★★
Boost M
intensity: ★★★
Buctril M
intensity: ★★★
CS-100-3317
intensity: ★★★
Curtail M
intensity: ★★★
DB-8454
intensity: ★★★
Deploy 75 DF
intensity: ★★★
Deploy WDG
intensity: ★★★
DPX-R9674 50 SG
intensity: ★★★
Dyvel
intensity: ★★★
Enlist Duo
intensity: ★★★
Estaprop XT
intensity: ★★★
Flaxmax
intensity: ★★★
Formula 40 C
intensity: ★★★
Frontline 2,4-D XC A
intensity: ★★★
Frontline 2,4-D XC B
intensity: ★★★
Frontline A
intensity: ★★★
Frontline B
intensity: ★★★
Frontline I
intensity: ★★★
Frontline XL
intensity: ★★★
GF-2654 TC
intensity: ★★★
GF-2654 TSOY
intensity: ★★★
GF-2726 TSOY
intensity: ★★★
Harmony Broadleaf
intensity: ★★★
MCPA 2 EH Ester 600
intensity: ★★★
MCPA Amine
intensity: ★★★
MCPA Amine 600
intensity: ★★★
MCPA Ester 500 LV
intensity: ★★★
MCPA Ester 600
intensity: ★★★
MCPA-K
intensity: ★★★
Mextrol 450
intensity: ★★★
Nimble
intensity: ★★★
Nimble WSB
intensity: ★★★
Nufarm Boost
intensity: ★★★
OcTTain XL
intensity: ★★★
Plus M Ester 600
intensity: ★★★
PP-31155
intensity: ★★★
PP-Q52-105
intensity: ★★★
Refine Extra 75 DF
intensity: ★★★
Refine SG
intensity: ★★★
Refine SG Toss-N-Go
intensity: ★★★
Restore II
intensity: ★★★
Retain A
intensity: ★★★
Retain B
intensity: ★★★
Rexade B
intensity: ★★★
Roundup Ultra Liquid
intensity: ★★★
Scuttle
intensity: ★★★
Stellar B
intensity: ★★★
Stellar XL
intensity: ★★★
Target
intensity: ★★★
Thumper
intensity: ★★★
Traxos Two Broadleaf Component
intensity: ★★★
Triton C
intensity: ★★★
Triton C 75 DF
intensity: ★★★
Trophy 600 A
intensity: ★★★
Trophy 600 B
intensity: ★★★
Trophy A
intensity: ★★★
Trophy B
intensity: ★★★
Enforcer M
intensity: ★★
Accurate WSB
intensity: N/A
Ally 20 SG
intensity: N/A
Ally Herbicide Dry Flowable 60
intensity: N/A
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
Banvel
intensity: N/A
Banvel Dry Eg
intensity: N/A
Broadband
intensity: N/A
BRY/MAE 2 (A Component of RRR/BRY/MAE Herbicide Tank Mix)
intensity: N/A
Carnival 540
intensity: N/A
Clearout 41 Plus
intensity: N/A
Clopyralid
intensity: N/A
Compas 480 EC
intensity: N/A
Credit 360
intensity: N/A
Credit 45
intensity: N/A
Credit Plus
intensity: N/A
Credit Xtreme
intensity: N/A
Curtail F
intensity: N/A
DB-858
intensity: N/A
Durango
intensity: N/A
Dycleer Agricultural
intensity: N/A
Engenia
intensity: N/A
Express DF 75
intensity: N/A
Express SG EUP
intensity: N/A
Express Toss-N-Go Dry Flowable 75
intensity: N/A
Fexapan Plus Vaporgrip Technology
intensity: N/A
Flaxmax Herbicide Component of Tank Mix
intensity: N/A
Fluroxypyr 180
intensity: N/A
Fluroxypyr EC
intensity: N/A
Fluroxypyr WDG
intensity: N/A
FX
intensity: N/A
GF-184
intensity: N/A
GF-2018
intensity: N/A
GF-772
intensity: N/A
GF2050
intensity: N/A
Glean
intensity: N/A
GlyKamba
intensity: N/A
Impede
intensity: N/A
Inferno WDG
intensity: N/A
M1691
intensity: N/A
Metsulfuron Methyl EUP
intensity: N/A
Metsulfuron Methyl EUP Toss-N-Go
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
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
Nufarm Trophy 600 A
intensity: N/A
Nufarm Trophy 600 B
intensity: N/A
NuGlo
intensity: N/A
Outshine
intensity: N/A
Perimeter
intensity: N/A
Perimeter II
intensity: N/A
Polaris
intensity: N/A
Powermax Liquid
intensity: N/A
Prestige A
intensity: N/A
Prestige B
intensity: N/A
Prestige XC A
intensity: N/A
Prestige XC B
intensity: N/A
Prestige XL
intensity: N/A
Reclaim II A
intensity: N/A
Reclaim II B
intensity: N/A
Refine Extra 75 Toss-N-Go
intensity: N/A
Renegade HC Liquid
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
Touchdown IQ
intensity: N/A
Tribenuron Methyl EUP DF 75
intensity: N/A
Triton Broadleaf
intensity: N/A
XRM-5171
intensity: N/A