"William W. Plummer" wrote in message news:3X43d.116278$3l3.111817@attbi_s03...
Steveo wrote:
HWick wrote:

why not use MSMA? You may need to treat two or more times but it works
well. it also kills other bad stuff. ??


Heh, the first frost will kill 100% of it.

Right. The idea is to kill the crabgrass, and only the crabgrass,
before it produces seeds. If you attempt to do this by mowing, be sure
you use a catcher to pick up all the clippings and seeds. FWIW, I
just use Bonide "crabgrass killer". It took three applications this
year but I don't think I'll have to use preemergent crabgrass killer
next spring.

Roundup it almost always the wrong thing to use for crabgrass. It kills
absolutely everything green and will leave gaping spots in your lawn.


If you look at the OP, the suggested method of using plastic ground
cover for crabgrass was obviously for use in an area where the goal
was to kill everything, unless you think grass will survive 6 weeks of
being covered by plastic. For that application, Roundup is the best
solution.