Long-term Pesticide Free Production Study
This experiment has been added by the GLTEN Curators using existing published sources.
- Objective
- To investigate the effects of Pesticide Free Production (PFP), a production system where in-crop herbicides were omitted from certain crops in rotation, on weed populations and crop performance in two crop rotations. The goal is to maintain productivity and reduce pesticide applications.
- Data Access Statement
- Don't know
- Data license
- Don't know
- Data policy
- Don't know
- Organization
- Faculty of Agricultural and Food Sciences, University of Manitobaresearch organisation
- People
- Robert H. Guldenprincipal investigatorUniversity of ManitobaFaculty of Agricultural and Food SciencesBecky Dueckexperiment managerUniversity of ManitobaFaculty of Agricultural and Food Sciences
Site: Ian N. Morrison research farm
- Type
- research farm
- Location
- CarmenManitobaCanada
- Geographic location
- 49.496667, -98.040556
- Elevation
- 267 Metres
- Visits permitted?
- No
- Soil description
- Orthic Black Hochfeld fine loam soil
Design period: Phase 1 (2000—2016)
- Design description
- The experiment has two fully phased rotations with three treatments: Control - in-crop herbicides were applied on all annual crops. PFP1 - in-crop herbicides not applied to oats. PFP2 - in-crop herbicides not applied to oats and flax. Two further control plots of native prairie and chemical fallow are included. In 2010 the rotations were updated to include wheat, canola, and soybean which are commonly grown in 3 and 4-year rotations in Manitoba.
- Number of plots
- 26
- Number of harvests per year
- 1
- Crops
Crop Years grown wheat alfalfa rapeseed flax oats soybeans - Crop Rotations
- Annual rotation 2000—2010
- 1rapeseed(canola)
- 2wheat
- 3flax
- 4oats
Perennial rotation 2000—2010- 1alfalfaalfalfa
- 2alfalfaalfalfa
- 3flax
- 4oats
Annual rotation revised 2011—2016- 1wheat
- 2soybeans
- 3wheat
- 4rapeseed
Perennial rotation revised 2011—2016- 1rapeseed
- 2soybeans
- 3wheat
- Factor
- Factor name
- Factor levels
- pesticide exposure
1 PFP Crop
In crop herbicides applied to oats2 PFP Crop
In crop herbicides applied to flax and oatscontrol exposure
In-crop herbicides were applied on all annual crops.
- Measurements
Variable Material Units Frequency Scale Comment grain yield trait Not specified soil weed seed bank Not specified Species composition and density economic data Not specified
Design period: Phase 2 (2017—)
- Description
- The study was modified to reflect modern weed management techniques in Manitoba to reduce the weed seedbank and herbicide-resistant green foxtail.
- Design description
- The experiment continues the two previous rotations in modified form and replace herbicide use with row spacing as treatment factor. The control plots of native prairie and chemical fallow are continued.
- Number of plots
- 26
- Number of harvests per year
- 1
- Crops
Crop Years grown wheat soybeans rapeseed - Crop Rotations
- Annual rotation 2017—
- 1wheat
- 2soybeans
- 3wheat
- 4rapeseedCanola
Perennial rotation 2017—- 1rapeseedCanola
- 2soybeans
- 3wheat
- Factor
- Factor name
- Factor levels
- row spacing
Narrow spacing
Spacing for each crop is: 7.5" - wheat; 15" - soybean; 7.5" rapeseedcontrol exposure
Spacing for each crop is: 15" - wheat; 30" - soybean; 7.5" rapeseed
- Measurements
Variable Material Units Frequency Scale Comment grain yield trait Not specified soil weed seed bank Not specified economic data Not specified
Related publications
- Project website
- Gulden, Robert H. 2012. Long-term Pesticide Free Production Study at Carman, MB (2000). Prairie Soils and Crops 5:30-35.