Rapid wrote:
Stubby wrote:
wrote:
.....
Yes, the ag extension guy said pre-emergent applied again late summer
would help control it.
That's bogus. Preemergent controls prevent the seeds from sprouting
in early spring. In order to kill the plants before they set seed in
summer/fall, use a crabgrass killer several times.
you are partially correct. preemergent controls prevent seeds from
sprouting, period.
Of course, you're right. However, in the late summer crabgrass plants
are mature and setting seed. We don't want those seeds to hit the
ground. So, we kill the plants. I may be wrong, but that's why Ortho,
Bonide and other companies produce "crabgrass killers". In my
experience they work very well when applied according to the directions.