Pasture spraying - Ask Extension
I have horses and want to spray for broadleaf weeds. Have tank sprayer for my tractor. Pics attached show most common plants.
Knowledgebase
Pasture spraying #802498
Asked July 22, 2022, 2:40 PM EDT
I have horses and want to spray for broadleaf weeds. Have tank sprayer for my tractor. Pics attached show most common plants.
Clackamas County Oregon
Expert Response
Hi Brian,
We would be happy to provide you with more information on broadleaf herbicides. The Pacific Northwest Weed Management Handbook is an excellent resource for finding the right herbicide. This website will list the options for each weed and it includes timing, rate, and other important considerations. As you probably know, it is critical to apply herbicides exactly as the label states. The PNW Handbook has a section on herbicides for pastures here - http://pnwhandbooks.org/weed/pasture-rangeland/small-pastures/management-reduce-weed-problems
For more specific information based on your pictures, see below:
1. Blackberry - I have included an article on methods of control, this is useful and it is important to remember that it is best to use multiple methods (ex: mechanical and chemical) for the best results and that it may take a few seasons of management to get it under control. 2. Catsear Dandelion - From your picture, it looks to be Catsear Dandelion also known as False Dandelion (Hypochaeris radicata). This can be an aggressive weed that has been connected to stringhalt in horses. OSU Extension has a fact sheet on this condition and the plant.
3. It is a little difficult judging by this picture. Having a photo with the leaves and stem would be helpful. It could be an Oxeye Daisy, but I am not confident making an ID without additional pictures. You can reply to this email to send more photos for an ID.
Here is a page with more information about Oxeye Daisy - https://www.nwcb.wa.gov/weeds/oxeye-daisy If you have any follow-up questions, please reach out.
Sincerely,
We would be happy to provide you with more information on broadleaf herbicides. The Pacific Northwest Weed Management Handbook is an excellent resource for finding the right herbicide. This website will list the options for each weed and it includes timing, rate, and other important considerations. As you probably know, it is critical to apply herbicides exactly as the label states. The PNW Handbook has a section on herbicides for pastures here - http://pnwhandbooks.org/weed/pasture-rangeland/small-pastures/management-reduce-weed-problems
For more specific information based on your pictures, see below:
1. Blackberry - I have included an article on methods of control, this is useful and it is important to remember that it is best to use multiple methods (ex: mechanical and chemical) for the best results and that it may take a few seasons of management to get it under control. 2. Catsear Dandelion - From your picture, it looks to be Catsear Dandelion also known as False Dandelion (Hypochaeris radicata). This can be an aggressive weed that has been connected to stringhalt in horses. OSU Extension has a fact sheet on this condition and the plant.
3. It is a little difficult judging by this picture. Having a photo with the leaves and stem would be helpful. It could be an Oxeye Daisy, but I am not confident making an ID without additional pictures. You can reply to this email to send more photos for an ID.
Here is a page with more information about Oxeye Daisy - https://www.nwcb.wa.gov/weeds/oxeye-daisy If you have any follow-up questions, please reach out.
Sincerely,
Thank you Hayley. Very helpful information.
Brian Casey
