Presentation is loading. Please wait.

Presentation is loading. Please wait.

Cropping Practices that Influence Weed Management

Similar presentations


Presentation on theme: "Cropping Practices that Influence Weed Management"— Presentation transcript:

1 Cropping Practices that Influence Weed Management
John Cardina Ohio State University

2 Two goals: Don’t let weeds emerge. Don’t let escaped weeds produce seeds.

3 Crop Rotation Changing crop sequences to create an unstable and inhospitable environment for weed establishment and survival – resource availability allelopathic effects soil disturbance soil fertility mechanical damage X time

4 Grass crop Legume vegetable Mustard Cover crop Legume Forage Small grain

5 Grass crop Easy to cultivate Fibrous roots Competitive cultivar
Legume vegetable Easy to cultivate Fibrous roots Competitive cultivar Fast seedling growth Dense canopy Mustard Cover crop Legume Forage Small grain

6 Smother seedlings Allelopathy Cover crop Mixed root structure
Grass crop Legume vegetable Smother seedlings Allelopathy Mixed root structure Mustard Cover crop Legume Forage Small grain

7 Crop type – canopy shape, shading etc
Crop Rotation Impacts: UNSTABLE CONDITIONS Crop type – canopy shape, shading etc Chemical environment – fertility, allelopathy Physical environment – temperature, light, moisture Timing of all field operations – planting, tillage, cultivation, harvest etc.

8 Crop Competition ~ 50% of weed control variety selection
resources – fertility, water row spacing, seeding rate soil management

9 Allelopathy

10 physical & chemical suppression
Cover Crops – physical & chemical suppression Rye Grass-legume Hairy vetch

11 - killed, mowed - incorporated - surface residue
Cover Crops – - killed, mowed - incorporated - surface residue Buckwheat Crimson clover Mustard

12 Smother Crops Winter-pea Red clover Sorghum-sudangrass Oats

13 Mustard smother crops Corn Soybean

14 Prevent weed emergence:
physical suppression shade allelopathy Prevent weed seed production:

15 Prevent weed emergence:
cover & smother crops crop competition Prevent weed seed production:


Download ppt "Cropping Practices that Influence Weed Management"

Similar presentations


Ads by Google