PL SC352 Study Guide - Final Guide: Canadian Food Inspection Agency, Plant Genetics, Rna Interference
30 Apr 2018
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Methods of Weed Control
5 Methods generally recognized:
1) Prevention (sanitation + containment)
2) Mechanical
3) Biological (bio-herbicides, RNAi technologies)
4) Chemical
5) Cultural
Prevention: measures taken to avoid the introduction, establishment and spread or
specific weeds in areas where they do not currently occur
- use of a Certified Seed reduces but does NOT eliminate weed seeds
Seeds Act and Regulations
- Canadian Food Inspection Agency responsible (federal)
- Ensures seeds sold in, imported into and exported from Canada meet standards
for quality and are labeled and are registered prior to sale in Canada.
Weed Seeds Order:
- Class 1 Prohibited Noxious Weed Seeds
Class 2 Primary noxious weed seeds
Class 3 secondary noxious weed seeds
Class 4 secondary noxious weed seeds
Class 5 noxious weed seeds, Class 6 other weed seeds
Certified Seed
• does not mean weed free
• certificate of analysis, outlines. All certified seeds come with a label
o species
o # of weed seeds present
• 0 tolerance for any prohibited noxious weed seeds (Weed Seeds Order) in any
pedigreed seed
o however, different degrees where it’s allowable
• Certified seed tag guarantees seed has gone through all proper multiplication,
inspection and cleaning processes to ensure a pure product
o Seed that is true to type
o a pure variety access to newest plant genetics
o more uniform germination for stronger competition in the field
o easier harvest higher yields
- Seeds Act and Weed Control act are not the same.
- At Breeder, Select and Foundation levels, there is almost 0 tolerance for any
weed seed content
o tolerance levels increase in the Registered and Certified classes
- 0 tolerance for any prohibited noxious weed seeds (Weed Seeds Order) in any
pedigree seed.
Re-use of seed
- wheat, barley + other cereals usually re-sown
- canola, peas, special crops usually purchased seed
- seed cleaning an OPTION for producers who re-use their seed
- “Brown bag” seed (sold in a non-certified seed manner) may be a source of new
weeds
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
5 methods generally recognized: prevention (sanitation + containment, mechanical, biological (bio-herbicides, rnai technologies, chemical, cultural. Prevention: measures taken to avoid the introduction, establishment and spread or specific weeds in areas where they do not currently occur. Use of a certified seed reduces but does not eliminate weed seeds. Ensures seeds sold in, imported into and exported from canada meet standards for quality and are labeled and are registered prior to sale in canada. Class 5 noxious weed seeds, class 6 other weed seeds. Certified seed: does not mean weed free, certificate of analysis, outlines. Seeds act and weed control act are not the same. At breeder, select and foundation levels, there is almost 0 tolerance for any weed seed content tolerance levels increase in the registered and certified classes. 0 tolerance for any prohibited noxious weed seeds (weed seeds order) in any pedigree seed. Wheat, barley + other cereals usually re-sown. Canola, peas, special crops usually purchased seed.
