Canada

Annual bluegrass (annual meadow grass, winter grass)

Poa annua

P. annua is an annual grass, which may persist as a short-lived perennial depending on habitat, climate and management. It is a weakly competitive weed with rapid flowering and profuse seedling.

Leaves are often transversely wrinkled with characteristic tramlines.

Tufted, 5 - 30 cm (1.97 - 11.81 inch) high, root at the nodes, youngest leaf folded.

Erect, in the vegetative state geniculate. Flowering culms are erect and smooth 10 - 30 cm (3.93 - 11.81 inch) tall, without hairs.

Leaves flat, slightly keeled with characteristic 'tramlines'; smooth and abruptly contracted at the apices ('boat-shaped tip'). Transversely wrinkled.
Ligule membranous and typically 2-3(-5) mm 0.078 - 0.118 - 0.197 inch) long, often truncate or acute.
No auricles.
Sheath is smooth, keeled and somewhat compressed.

Pesticides
Advance 10G
intensity: ★★★
Arsenal
intensity: ★★★
Arsenal Powerline
intensity: ★★★
Carnival 540
intensity: ★★★
Cheminova Glyphosate
intensity: ★★★
Cheminova Glyphosate II
intensity: ★★★
Clearout 41 Plus
intensity: ★★★
Credit 360
intensity: ★★★
Credit 45
intensity: ★★★
Credit Plus
intensity: ★★★
Credit Xtreme
intensity: ★★★
Cycle
intensity: ★★★
Depose
intensity: ★★★
Devrinol 10-G
intensity: ★★★
Devrinol 2-G Ready-to-use
intensity: ★★★
Eptam 8-E
intensity: ★★★
Flexstar GT
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: ★★★
Hyvar X-L Weed And Brush Killer
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: ★★★
Nufarm Glyphosate 360
intensity: ★★★
NuGlo
intensity: ★★★
Polaris
intensity: ★★★
Powermax Liquid
intensity: ★★★
R/T 540 Liquid
intensity: ★★★
Renegade HC Liquid
intensity: ★★★
Rival Emulsifiable Concentrate Liquid
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: ★★★
Sencor 500 Flowable
intensity: ★★★
Sencor 75 DF
intensity: ★★★
Sencor Solupak
intensity: ★★★
StartUp
intensity: ★★★
Touchdown 480 Liquid
intensity: ★★★
Touchdown IQ
intensity: ★★★
Touchdown Total
intensity: ★★★
Traxion
intensity: ★★★
VisionMAX
intensity: ★★★
Dacthal W-75
intensity: ★★
Devrinol 2-XT
intensity: ★★
Devrinol 50-DF
intensity: ★★
Guardsman Glyphosate
intensity: ★★
Clethodim 250
intensity: N/A
Conquest A Herbicide Tank Mix
intensity: N/A
Conquest B
intensity: N/A
Crush'R 480
intensity: N/A
Crush'R 540
intensity: N/A
Crush'R Plus
intensity: N/A
Durango
intensity: N/A
Lexone DF
intensity: N/A
Rival 10G Superflow
intensity: N/A
Sencor 480 F
intensity: N/A
Trifluralin 10G
intensity: N/A
Triflurex 40 EC
intensity: N/A