Preparing a beautiful lawn requires perseverance and patience when you work out to eradicate weeds. Herbicides are an important weapon in the arsenal of lawn weed control. There are two types of herbicides are commonly used: pre emergence and post emergence. The names describe when the herbicide kills weeds. Pre-emergent eliminate weeds before germinating shoots soil. The post-emergent weed decimates actively and has already hit the ground. We Landscaping Alpharetta will show you some key points to know about the pre & post herbicides.
These herbicides do not stop the weeds germ, but interrupt before an outbreak pushes through the ground. A common example of a pre-emergent herbicide is a preventive male leg that detects crab seed new plants.
Secrets To Success
- With pre-emergent herbicides, it’s vital to treat the entire lawn area. If you miss a spot, weeds can sprout there.
- Most pre-emergents require watering in, even liquid forms applied using a hose-end sprayer. With liquid herbicides, the volume of water used to disperse the weed killer is not great enough to wash the material into soil, where weed seeds lie waiting to germinate. That’s why you have to water after application.
- Use caution when applying pre-emergent herbicides to newly seeded lawns – or to areas you plan to seed. Read the label carefully. For most products, the label stipulates how many mowings, after seeding, to wait before application. The label also states how long to wait after application before sowing lawn seed.
These herbicides tackle both perennial and annual broadleaf weeds (weeds with leaf shapes that don’t resemble grass), and some even control grassy weeds (weeds that resemble grass). Choose post-emergent herbicides to control existing weeds in a lawn. It’s an ideal herbicide for spot-treating lone offenders.
Secrets To Success
- Young, actively growing weeds die most easily and create less of an eyesore than mature weeds, which might require repeat applications for complete kill.
- Inspect the lawn frequently (while mowing is a good time) to look for new weeds that have germinated and require treatment.
When To Apply
For both pre- and post-emergent herbicides, timing is critical. While post-emergent herbicides kill weeds at any point in the growth cycle, you’ll have the best success spraying young, actively growing weeds. Mature weeds may require repeated applications for total kill.
With pre-emergent herbicides, you’ll want to apply the chemical prior to the time weed seeds start germinating. If you apply too early, these herbicides will have degraded and are useless when seeds start to germinate. Most pre-emergent crabgrass killers remain active in soil for six to eight weeks.
Weed seed germination occurs when soil reaches the correct temperature. The best way to determine the ideal time to apply pre-emergents is to contact your local extension agent or master gardeners, who have access to regional soil temperature data.
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