Links to more information

There is a wealth of information about herbicide resistance on the World Wide Web. To learn more about managing herbicide resistance, check out these websites or explore the web yourself to find others that have information relevant to your farm. Remember, the more you know about herbicide resistance, the easier it is to manage.

International survey of herbicide resistant weeds

Why resistant weeds are resistant

Principles of Herbicide Resistance in Weeds PDF

Overview sites

Websites that provide overviews of herbicide resistance; some also have links to other websites you might find interesting:

extension.umn.edu	canola-council.org
ontariocorn.org	agriculture.gov.sk.ca
omafra.gov.on.ca	info.ag.uidaho.edu
umanitoba.ca	weeds.ippc.orst.edu
plant.uoguelph.ca

Provincial government websites

(Once on a home page, "search" for herbicide resistance; you could also try other search strings such as resistant weeds, etc.)

Alberta

B.C.

Manitoba

Nova Scotia

Ontario

Saskatchewan

Crop rotations

Crop rotations in Direct Seeding keep

Herbicide groups and modes of action

agric.gov.ab.ca	oznet.ksu.edu
omafra.gov.on.ca	co.yellowstone.mt.gov
pmra-arla.gc.ca

Herbicide resistance from a global perspective

(The first website below provides links to resistant weeds based on the reporting country (click on "Global Summary"); the second website provides links to countries based on resistant weeds (click on links under "Herbicide Group").

http://www.weedscience.org/in.asp

http://www.weedscience.org/summary/MOASummary.asp

General information

http://www.omafra.gov.on.ca/english/crops/facts/01-023.htm

Multiple herbicide resistance

http://www.umanitoba.ca/afs/fiw/040513.html

Spray-application expertise

For more detailed information about the many factors that influence coverage and ultimately weed control, consult these sources of spray-application expertise.

Best management practices for applying pesticides

Canada Sprayer Guide (sprayer calibration)

Ontario Ministry of Agriculture Food, and Rural Affairs website (sprayer calibration):

National Ag Safety Database (nozzle selection)

General sprayer operations

Pesticide Application and Choosing the right Nozzles - FAQ