Hey guys. New to the site and have spent hours reading most of the threads from this forum. What a great deal of info. Anyway, heres my problem. Over the last few years I have had my lawn's, approx. 10,000 sq. ft, appearance deteriorate due to what I believe to be a bentgrass infestation. It has taken over approx 40% of my yard. I have decided that in order to effectively eliminate the problem, I will be killing off everything with Round-up this fall and re-seeding. My plans are apply the herbacide in a couple applications over a two week period beginning at the end of this month. I plan on renting a slit seeder to do the seeding. Should I mow the grass down to .5" to 1" or so before applying the round-up or after its dead? Now I planned on renting a core aerator also, so should I aerate after the grass is dead and THEN mow it down to better break up the cores? Also, I live in Connecticut. I have decided that I would like to slit seed with a good KBG blend but was hoping to mix in some(30% or so) perennial rye. Now I understand that the rye germinates much quicker than the BG, so what I was thinking was in order to stop the rye from hurting the germination of the BG, I would wait a week or so and just broadcast spread the rye. Is this feasible? Any suggestions? My lawn gets excellent sun and the soil pH is good. The photo below was taken a couple years ago. Looking forward to your responses. Thanks. One more thing....There is no way to kill off the bent only without hurting the rest of the lawn, is there?