Ask a Question
Notify Me On Question Update
Email this Question
I think I have Johnsongrass invading my back lawn. I has sprayed the usual Crabgrass/lawn grassy weed killer on it and it is still taking over my entire lawn. What can I do?
Rate This FAQ
Here is a link to Johnson grass control from University of Missouri Extension. The excerpt below on control emphasizes an integrated approach, that is using many different methods to manage the Johnson grass, there is not a silver bullet but an integrated pest management approach to deal with this weed.
link to the article is http://extension.missouri.edu/publications/DisplayPub.aspx?P=g4872
Preventing johnsongrass from becoming established in new areas is the best available control method, because the weed spreads in so many ways. Because johnsongrass is a perennial weed, single cultural control measures or herbicide applications rarely provide adequate control.
Johnsongrass control programs should
* Prevent spread of rhizomes from infested to uninfested areas.
* Kill or weaken established plants and their underground rhizome system.
* Control seedlings originating from shattered seed.
* Prevent production of seed and its spread to new areas.
* Use fall tillage to bring rhizomes to soil surface, where they may be killed by winter conditions.
These objectives are closely related and are equally important to the success or failure of a control program. In limited infestations, it is possible and desirable to use herbicides to kill the weed and prevent seed production. The critical time to kill johnsongrass is while the weed is becoming established and before it has spread over the entire field. For sites with established infestations, a fall application of Roundup or Touchdown will kill emerged tissue and often developing rhizomes.
Submit Your Suggestion
Other Questions In This Topic
- Please send me a list of what is recommended for gardening vegetables as far as the soil is concerned.
- I have small white worms in my turnips and radishes. How do I deal with this problem?
- I have a small backyard that has a house on the west and north side, a cinder block wall on the east side and a large tree shading a portion on the south side. Due to the high sides of our yard, we tried some part shade/part sun plants last year. But they got blasted in the heat. Our yard doesn't get 10 hours of sunlight but it gets very hot. Can I sucessfully grow a vegetable garden in part of it up against the houses and plant something along the cinder block wall - preferably grapes or raspberries, or other covering plants (can be non-fruit). Can you recommend a plant we can grow along the wall, both in the shaded and sunny parts? Any recomendations for better use of the space?
- What is the cost for a soil test?
- When should I cut back spent tulips and daffadills?
- How do I keep lady bugs out of my house? Also, how do I keep out Asian Beetles?
- We would like to remove the lawn from a large area around some 40-50 ft pine trees and cover the area with decorative bark. The roots are close enough to the surface in some areas that using a sod cutter would damage the trees. Would it work to just spray the grass with a killer, such as Roundup, and then put the bark directly on the dead grass? Would this affect the trees in the areas of the partially exposed roots? Any other suggestions?
- We have a weed in our hay field that is choking out the field in quite a large area. The weed has a hard stem with heart shaped leaves about 1/4 to 1/2 inch in size around the stem leading to seed pods that look like flowers that are hard and have a seed in them. The seed is red and the husk around them is green when the seed leaves the husk is white, stem is hard green and stick like.