View Full Version : When is the best time to apply post-emergent herbicide to a lawn???

Vibe Ray
02-11-2001, 12:30 AM
When is the best time to apply post-emergent herbicide to a lawn??? Are there any tips or tricks you know about applying them? Thanx

02-11-2001, 12:33 AM
After you see the weeds.

02-11-2001, 12:36 AM
Apply post during any time you see active weed growth. Look for the type of weed on he label b4 applying. Most labels tell you not to apply over 85 degrees so the lawn wont burn.

Vibe Ray
02-11-2001, 12:43 AM
know you were gonna say that, Homer???

02-11-2001, 12:45 AM
I guess you knew the answer then already...

02-11-2001, 10:47 PM
Keep in mind, the herbicide will best be absorbed and translocated throughout the plant during its period of early vegatative growth. Follow the label information. Your target pest is usually listed.

Kent Lawns
02-12-2001, 10:46 AM
States require certification which requires you to know the answer before applying pesticides.

Best time to apply is Fall. The weeds are translocating carbohydrate reserves into the root systems which makes them extremely vulnerable to and herbicide application. The waxy summer coating on the leaves is gone and many new weeds have germinated and are growing at this time.

03-04-2001, 12:08 AM
The optimum time to control dandelions and other broadleaf weeds is in the fall and the second most effective time is in late spring, at or shortly after the flush of flowers. According to research, herbicide applications before mid-April will only "burn" the leaves and weeds will grow back by Summer. Herbicides containing 2,4-D, MCPP and dicamba are most effective for control of dandelions and other broadleaf weeds.

Broadleaf weed herbicides are systemic and move through the plant in the phloem, which also transports photosynthate. The more areas of the plant that the herbicide translocates to, the more effective the kill. In the fall, perennial plants are "preparing" for winter, translocating photosynthate and storage products to the roots. If a herbicide is applied in the fall, it will translocate with the photosythate throughout the plant and to the roots, thus causing a complete kill. In the early spring on the other hand, the plant tends to be moving storage products from it's roots to reinitiate leaves and flowers. Thus a herbicide applied at this time will tend to remain in the leaves, not translocating to the roots, causing a burning of the leaves at best but usually not a complete kill.

03-04-2001, 12:14 AM
Just remember if applying to a newly seeded lawn it's best to have mowed the grass 4-5 times prior to the application of herbicides if possible.

03-04-2001, 02:07 AM
When is the best time to apply post-emergent weed control?

Tuesday and Thursday between 9:00 and 10:30 am..

03-04-2001, 07:44 PM
The co-op has reccomended WeedOut by Fertiloam for app now for weed and feed on hybrid bermuda. Any comments?