Go BottomAerating and Crabgass Control
 | Lowell
Join Date: Feb 2002 Posts: 2 New Albany OH 
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2002-01-22 34853
I want to do core aerification on my lawn this spring and also use pre-emergence crabgrass control. I will probably do these a couple of weeks apart. Which one should I do first or does it make any difference? Also, can anyone recommend a liquid or a sprayable product for pre-emergence control" Thanks for your assistance.
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 | DennisCTB
Join Date: Nov 1998 Posts: 2707 NorthWest NJ 
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2002-01-22 34857
Around here they tell you to put your pre-emergent chemicals down when the the forsythia starts to bloom. It can be difficult as you don't know if the weather is going to be right for you. I live on the side of a hill that gets pretty windy that time of year and the granular product I use is recommended on calm days only.
You do not want to disturb the soil after application as this can cause crabgrass seeds to be brought up. The pre-emergent acts like a barrier, wherever its broken you are vulnerable. So you may want to aerate first.
Unfortunately, many of the spring time lawn things all of us would like to do are at odds with each other. Like pre-emergent application prohibits or delays reseeding plans, or aeration plans. Seems like I can never do all the things I want to do to the lawn, I always have to compromise or do one thing this spring and another the spring after. ....
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| ouimguy
Join Date: Jul 2003 Posts: 6 Norman Oklahoma
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2002-04-16 37520
I use Surflan or Princep to control my crabgrass on my Bermuda. I also have a good success using Team granular for preemurgence control. There are differing schools of thought about the practice of aeration after a preemergent application, but I feel the prevailing attitude now is that core aeration causes little or no reduction in the effectiveness of a preemergent application on Turfgrass. Here in Oklahoma I need to preemerge for my summer weeds earlier that I would want to core aerate. I never core aerate prior to full green-up. Aeration is quite a shock to the plant. It needs to be actively growing to handle the aeration. So I always have my preemergent application down before mu aeration and I have had great success. ....
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| BillyBob
Join Date: Oct 2003 Posts: 4 Michigan
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2002-05-31 39220
When you use a pre-emergence crabgrass control, you are putting a chemical barrier over your ground that prevents the crabgrass from germinating. The length the barrier last depends on the type of and how heavy of application you put down. When you aerate your lawn you poke thousands holes and pile the cores on top of the barrier, and have the possibility of the crabgrass germinating.
Aerating in the spring also makes it much eaiser for any other weed seeds to germinate. Always better to do it in the fall. Residential lawns only need to be aerated once a year, if not only every other year. ....
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