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
- When is the best time to seed native grasses such as streambank and western wheatgrass into an existing Kentucky Bluegrass lawn? Some of what I've read leads me to believe that it would be best to seed in late fall so the seed will germinate in the spring. But I wonder if it would be better to seed in early fall after stressing the KBG. I will also be seeding sheep fescue, but I've seen conflicting information on whether that is native or introduced. My goal is to have a lawn that can survive with no water, and stay green with very little water.
- What is West Nile Virus and how can I keep myself safe from it?
- How can I attract hummingbirds to my yard?
- I live in Toquerville, 20 miles north of St. George, but still just as hot. I'd like to plant a medium to large tree in my front yard to shade the garage a little. There is no grass, no regular water. I will be watering it by hand/hose until it's established & then would like something that could tolerate hot, dry summers. Maybe the Texas Honey Mesquite or African Sumac. Do you have any suggestions for me?
- Our grass is dying and we suspect a worm/grub problem since we have seen some yellowish worms come up when we have raked the thatch layer. When is the best time to treat to kill the worms? What is best to kill them if we don't know exactly what species they are? How long after treatment can we prepare and plant new grass seed?
- How do I prevent aspen sprouts from coming up in my lawn?
- How do I get rid of wild morning glory?
- I am actually in Colorado, I am interested in the zone(s) in Eden. I am designing a landscape there and want to plant accordingly. I, also, am interested in a list of noxious plants, I'd like to avoid them. Thank You!