[dishboy]

Originally Posted by phasthound

I'm not aware of any studies showing the effects of herbicides on soil microbes. Maybe Kiril does?
That being said, we have not seen anything in the field that points to decreased results due to pre-emergent. We always urge that if you decide to use post emergent just spot treat as needed. And the best defense against weeds is a thick healthy lawn.

http://www.indianjournals.com/ijor.a...d4&article=014
http://www.regional.org.au/au/asssi/...2_Weckertm.htm