Ask a Question
Notify Me On Question Update
Email this Question
when should i apply a preemregent to control the weed oxalis that is in my lawn? can you reccomend a particular product?
Rate This FAQ
Preemergent herbicides will work only as the weed seed is germinating and emerging out of the soil. If you see oxalis already growing in your lawn, use a postemergent herbicide.
Oxalis is usually growing at the lawn edge or where soil is bare. Keep your lawn healthy and vigorous and it will out-compete oxalis.
Oxalis also seems to grow where lawns have become increasingly shaded by trees that are growing larger in the yard. Once the oxalis is eliminated, overseed that lawn area with a shade tolerant grass seed so that the oxalis won't re-infest that area.
The USU Extension publication "Landscape and Garden Weed Control" (http://extension.usu.edu/files/publications/HG508.pdf) recommends preemergent herbicides containing isoxaben or pendimethalin for good preemergent control of oxalis.
Postemergent herbicides containing the active ingredients 2,4-D, MCPP and dicamba will control oxalis after it is already growing. Herbicides containing triclopyr and clopyralid also provide good postemergent control.
Recommendations for shade-tolerant turfgrass cultivars is available in the USU Extension publication "Turfgrass Cultivars for Utah" (http://extension.usu.edu/files/publications/publication/HG_Grass_2004_01.pdf
Submit Your Suggestion
Other Questions In This Topic
- What is a pre-emergent and a post-emergent?
- I have about an acre of commercial property that I want to control all vegetation. Is there a good ground sterilizer on the market? Where can I purchase it?
- I bought an azaleas from costco. How do I take care of it?
- Last May I planted an eight foot Sub-Alpine Fir in my new yard. My soil is very sandy. We deep watered the tree once a week throughout the hot season. The tree never showed any sign of stress until now (March). The ends of the branches are turning brown. I know these trees are sensitive. What can I do to best ensure the tree survives?
- I need to know what is best for killing vines? I have a fence full and I would like to get rid of them.
- Yesterday I applied "Scotts Turf Builder Plus 2 Weed Control" to my lawn. Unfortunately, I had the drop spreader set incorrectly. As a result I later discovered that I had accidently applied 4-5 times as much fertizer as specified on the bag. Will this damage the lawn? Is there anything I can do to prevent damage?
- I want to make a portion of my yard a 0scape environment. How do I prepare the area so that the grass/weeds to not take over? What tools will I need to make the soil acceptable? What time of year is best to plant new plants for this area?
- I have a very large Honey Locust tree on the West side of my house. It is dropping leaves and has a lost more dead branches then the previous years. What problems should I look for and what can I do to save this precious tree?