and Reducing Yield Loss in Flax Lena Syrovy and Steve Shirtliffe - - PowerPoint PPT Presentation

▶
and reducing yield loss in flax
SMART_READER_LITE
LIVE PREVIEW

and Reducing Yield Loss in Flax Lena Syrovy and Steve Shirtliffe - - PowerPoint PPT Presentation

Aug 24, 2022 193 likes •434 views

Seed, Seed, Seed! Managing Weeds and Reducing Yield Loss in Flax Lena Syrovy and Steve Shirtliffe Part I Cover Crops for Weed Control Year 1 Flax (without or with winter cereal) Flax only (no cover crop) Flax + Winter Wheat Flax +

slide-1
SLIDE 1

Seed, Seed, Seed! Managing Weeds and Reducing Yield Loss in Flax

Lena Syrovy and Steve Shirtliffe

slide-2
SLIDE 2

Part I – Cover Crops for Weed Control

slide-3
SLIDE 3

Year 1 – Flax (without or with winter cereal)

Flax only (no cover crop) Flax + Winter Barley Flax + Fall Rye Flax + Winter Wheat Photos: H.S.N. Duddu

slide-4
SLIDE 4

Year 2 - Cereal

Flax only (no cover crop) Flax + Winter Barley Flax + Winter Wheat Flax + Fall Rye

slide-5
SLIDE 5
slide-6
SLIDE 6

Weed Suppression

a b b ab 50 100 150 200 250 300 350

Flax Flax + Fall Rye Flax + Winter Barley Flax + Winter Wheat Weed Biomass (g m-2)

slide-7
SLIDE 7

Year 1 - Flax “suppression”

100 200 300 400 500 600

Flax Flax + Fall Rye Flax + Winter Barley Flax + Winter Wheat Year 1 Flax Yield (kg ha-1)

  • 46%

No cover crop vs cover crop: P = 0.04

slide-8
SLIDE 8

Year 2 – Cereal Yield

200 400 600 800 1000 1200 1400 1600 1800

Flax/SW Flax/SR Flax + FR/FR Flax + WB/SW Flax + WW/WW Year 2 Cereal Yield (kg ha-1)

slide-9
SLIDE 9

Reduced Cover Crop Seeding Rates

50 100 150 200 250 300 350 400 450 0.0 0.5 1.0

Flax Yield (kg ha-1) Cover Crop Seeding Rate (prop of recommended)

b b a

1x = 200 targeted plants m-2 0.5x = 100 targeted plants m-2 P = 0.02

slide-10
SLIDE 10

Flax + Winter Cereal

Flax only (no cover crop) Flax + Winter Barley Flax + Fall Rye Flax + Winter Wheat Photos: H.S.N. Duddu

slide-11
SLIDE 11

Part II – Mechanical Weed Control

slide-12
SLIDE 12

Slide credit: O. Alba

slide-13
SLIDE 13

Slide credit: O. Alba

slide-14
SLIDE 14

10” row cultivation organic hemp Kroeker Farms/Poplar Grove Organics

Slide credit: K. Stanley

slide-15
SLIDE 15

Flax crop 5-10 cm or taller Pre-emergence or after flax crop rooted

Slide credit: O. Alba

slide-16
SLIDE 16

Crop Seeding Rate vs Weeds

70 plants m-2 140 plants m-2 280 plants m-2 560 plants m-2

Redlick et al., 2014, Weed Sci. 65(4): 525-533

All Plots Herbicide Free

slide-17
SLIDE 17

IWM for organic flax

+ +

Increased crop seeding rates Rotary hoe Inter-row cultivation

slide-18
SLIDE 18

IWM for organic flax

200 400 600 800 1000 1200 500 1000 1500 2000

Flax Yield (kg ha-1) Seeding Rate (targeted plants m-2)

Control Rotary Hoe Inter-row Rotary Hoe + Inter-row

50 100 150 200 250 300 350 400 450 500 500 1000 1500 2000

Weed Biomass (g m-2) Seeding Rate (targeted plants m-2)

Control Rotary Hoe Inter-row Rotary Hoe + Inter-row

2.2 x 22% 55% 33%

slide-19
SLIDE 19

Flax Tolerance to Rotary Hoe

250 plants/m2 2000 plants/m2

slide-20
SLIDE 20

Control Rotary hoe Inter-row Combined 2000 plants/m2 seeding rate at Goodale Inter-row Combined Control Rotary hoe 250 plants/m2 seeding rate at Goodale Photos: Y. Shen

slide-21
SLIDE 21

250 plants/m2 seeding rate at Kernen Control Rotary hoe Inter-row Combined Rotary hoe Control Inter-row Combined 2000 plants/m2 seeding rate at Kernen Photos: Y. Shen

slide-22
SLIDE 22
slide-23
SLIDE 23

Acknowledgements

  • Technical & Research Staff:

–

Agronomy Research Crew: Shaun Campbell, Taryn Zdunich & many others

  • Graduate and Undergraduate Students

–

Quentin Lebastard, Oleksandr Alba, Yanben Shen