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
- I would like to find out where I can obtain a list of the daily rainfall/precip totals for the Logan area.
- 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.
- We tilled our garden and planted peas and lettuce about three weeks ago. Nothing has come up yet. We were talking to our neighbor yesterday, and he told us that about 30-40 years ago, in a fit of vexation, the former owner spread an industrial strength soil sterilizing chemical on the area in which we planted our garden. He further explained that weeds have only started to grow in that area in the past 5-10 years. This information has caused my wife to give up on trying to cultivate this area. Should we give up? What can we do to amend the soil in this area?
- When should I cut back spent tulips and daffadills?
- I just moved to SLC from Phx,Az and many of the plants here are new to me. I have some flowers in my yard that resemble "Blue Dicks" closely but, the flowers do not cluster -- they each form on a single stem and have been flowering since the end of April. I also have some Violet-like flowers growing in my lawn at about the same height as the grass. I would like to know what they might be and where I might be able to purchase seed or bulbs of the same type so I can plant more
- I've just moved here from Maryland and I'm starting to landscape our yard. I've noticed that none of my neighbors use mulch in their flower beds. Why is that? I thought mulch helped to keep the soil moist as well as keep out the weeds. Plus you can till it back into the soil in the fall for aeration.
- Can you tell me how to get rid of the Star of Israel that is in your lawn?
- My new austrian pines planted in the fall are looking pale in color and a lot of needles have fallen off. Also, my older austrian pines are looking the same way. What do they need? The soil has a lot of clay and is quite alkaline. My new spruce in the same area is doing great. What do the pines need?