Canada

Giant ragweed

Ambrosia trifida

This is an annual herb usually growing up to 2 m (6 ft 7 in) tall, but known to reach over 6 m (20 ft) in rich, moist soils. The tough stems have woody bases and are branching or unbranched. Most leaves are oppositely arranged. The blades are variable in shape, sometimes palmate with five lobes, and often with toothed edges. The largest can be over 25 cm (9.8 in) long by 20 cm (7.9 in) wide. They are borne on petioles several centimeters long. They are glandular and rough in texture. The species is monoecious, with plants bearing inflorescences containing both pistillate and staminate flowers. The former are clustered at the base of the spike and the latter grow at the end. The fruit is a bur a few millimeters long tipped with several tiny spines.

Pesticides
2,4-D Amine 500
intensity: ★★★
2,4-D Ester 700
intensity: ★★★
2,4- D Ester 700
intensity: ★★★
2,4-D LV-700
intensity: ★★★
Agri Star 2,4-D Ester 700
intensity: ★★★
Agri Star MCPA DMA 500
intensity: ★★★
Albaugh 2,4-D Amine 600
intensity: ★★★
Albaugh MCPA Ester 600 Liquid
intensity: ★★★
Arsenal
intensity: ★★★
Arsenal Powerline
intensity: ★★★
Banvel
intensity: ★★★
Banvel VM Pro
intensity: ★★★
Basagran Forte
intensity: ★★★
Basagran Liquid
intensity: ★★★
BASF Pyramin DF
intensity: ★★★
Betamix B FC
intensity: ★★★
Blackhawk
intensity: ★★★
Dicamba L
intensity: ★★★
Dyvel
intensity: ★★★
Element
intensity: ★★★
Enlist Duo
intensity: ★★★
Garlon 4
intensity: ★★★
Garlon Ultra
intensity: ★★★
Garlon XRT
intensity: ★★★
GF-2654 TSOY
intensity: ★★★
GF-2726 TSOY
intensity: ★★★
Laddok
intensity: ★★★
Marksman
intensity: ★★★
PP-3317
intensity: ★★★
Pursuit Herbicide for Soybeans
intensity: ★★★
Remedy EC
intensity: ★★★
Remedy MSO
intensity: ★★★
Remedy XRT
intensity: ★★★
Rexade B
intensity: ★★★
Roundup Ultra Liquid
intensity: ★★★
Roundup Xtend with VaporGrip Technology
intensity: ★★★
SC547
intensity: ★★★
Summit WG
intensity: ★★★
Traxos Two Broadleaf Component
intensity: ★★★
Truvist
intensity: ★★★
Vanquish
intensity: ★★★
XtendiMax with VaporGrip Technology
intensity: ★★★
PSABRY
intensity: ★★
RRRPSABRY
intensity: ★★
Distinct
intensity: ★
Infinity
intensity: ★
Velocity m3 All-In-One
intensity: ★
Attain A
intensity: N/A
Attain B
intensity: N/A
Attain XC A
intensity: N/A
Banvel Dry Eg
intensity: N/A
Boost M
intensity: N/A
Carnival 540
intensity: N/A
Clearout 41 Plus
intensity: N/A
Converge Pro Suspension
intensity: N/A
Credit 360
intensity: N/A
Credit 45
intensity: N/A
Credit Plus
intensity: N/A
Credit Xtreme
intensity: N/A
Deploy 75 DF
intensity: N/A
DPX-R9674 50 SG
intensity: N/A
Durango
intensity: N/A
Dycleer Agricultural
intensity: N/A
Elim EP 25
intensity: N/A
Elim EP 5 DF
intensity: N/A
Elim SG Toss-N-Go
intensity: N/A
Engenia
intensity: N/A
Eragon
intensity: N/A
Eragon LQ
intensity: N/A
Estaprop XT
intensity: N/A
Fexapan Plus Vaporgrip Technology
intensity: N/A
Fluroxypyr 180
intensity: N/A
GF-184
intensity: N/A
GF-2018
intensity: N/A
GF-772
intensity: N/A
GF-871
intensity: N/A
GlyKamba
intensity: N/A
Impede
intensity: N/A
Integrity
intensity: N/A
M1691
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
Nimble
intensity: N/A
Nimble WSB
intensity: N/A
Nu-Image
intensity: N/A
Nufarm Boost
intensity: N/A
Nufarm Fluroxypyr
intensity: N/A
Nufarm Glyphosate 360
intensity: N/A
NuGlo
intensity: N/A
Optill
intensity: N/A
Polaris
intensity: N/A
Powermax Liquid
intensity: N/A
PP-31155
intensity: N/A
Princep Nine-T
intensity: N/A
Pulsar
intensity: N/A
Pursuit
intensity: N/A
Refine Extra 75 DF
intensity: N/A
Refine Extra 75 Toss-N-Go
intensity: N/A
Refine SG
intensity: N/A
Refine SG Toss-N-Go
intensity: N/A
Renegade HC Liquid
intensity: N/A
Roundup Transorb Liquid
intensity: N/A
Sentrallas
intensity: N/A
Signal F
intensity: N/A
Syna16003
intensity: N/A
Vios G3
intensity: N/A