I have an outbreak of switchgrass in my lawn. I need to stop it asap. Thanks. Ken in Montana.
How to get rid of weeds?
Here are some links with more information.
https://www.gardeningknowhow.com/special/organic/weed-it-and-reap-how-to-make-your-garden-more-appealing-without-chemicals.htm
https://www.gardeningknowhow.com/plant-problems/weeds/weed-control.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/vegetable-weed-control.htm
https://www.gardeningknowhow.com/plant-problems/weeds/using-herbicide-in-gardens.htm
I have read up that you can use vinegar on the patio to get read of weeds, as I have a dog. What type of vinegar do I use?
White vinegar. This article will have more information: https://www.gardeningknowhow.com/garden-how-to/info/use-vinegar-in-gardens.htm
For additional pet friendly weed killers, this article will also help: https://www.gardeningknowhow.com/special/organic/homemade-pet-friendly-weed-killer.htm
Can we utilize allelopathy effect as weedicide in field crops, biennials and perennials in sub-tropical situation? If yes, please explain with some live examples. Not necessary.
Though this is outside of my expertise I did find some links for you that may be of help.
https://www.gardeningknowhow.com/garden-how-to/info/allelopathic-plants.htm
http://cdn.intechopen.com/pdfs-wm/44271.pdf
http://www.fao.org/docrep/006/y5031e/y5031e0d.htm
I have been told that it is good to put weed killer on the garden in the fall and that it will help control the weeds next year. Is there any truth to this?
Yes, applying a pre-emergent in the fall is the best.
You can apply any time now through November.
Here are some links for you with more information. Always follow the application directions for the specific product that you use.
https://www.gardeningknowhow.com/lawn-care/lgen/lawn-care-tips-for-the-fall.htm
https://www.agry.purdue.edu/turfnew/pubs/ay-9.pdf
https://www.gardeningknowhow.com/plant-problems/weeds/pre-emergent-herbicides.htm
Wyoming has a lot of wind, hence the problem with tumbleweeds. They have taken over our backyard and we would like to make sure they are dead and gone before doing any new landscaping.
Different plants actually can become tumbleweeds.
Treating the problem plants with pre emergent herbicide may help.
The last paragraph in the article below will help.
https://www.gardeningknowhow.com/ornamental/foliage/kochia/kochia-plant-info.htm
My son's flower and shrub garden is heavily invaded by crabgrass. We sprayed weed killer and put down landscaping fabric and mulch before making the garden. What can we do?
Here are some links that will help you.
Crabgrass is tough to treat when it is in the flower bed.
Using herbicides will kill the crabgrass, but also anything else it touches.
Remove as much as you can this fall, this will help reduce the seeding in the spring.
You can get the problem under control by weeding by hand, it just is more work and takes time.
Here are a couple of links for you with more information.
https://www.gardeningknowhow.com/plant-problems/weeds/crabgrass-control.htm
https://www.gardeningknowhow.com/special/organic/cornmeal-in-the-garden.htm