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Green Up
02-24-2009, 08:15 PM
How late is to late to apply Pre-M for the south. Day temp. around 50-70 and night in the mid 20's. I saw a yard today that had some green up. The rest have just annual winter weeds. Has anyone used 2-4-D amine much during this time of year for the winter annuals? Thanks for the info.

IRRITECH
02-24-2009, 08:32 PM
Skip the pre-m and go with one round of Dimension. 2-4-d ESTER formulation for winter weeds.

tombo82685
02-24-2009, 09:06 PM
I would use triclopyr (make sure you mix it well) or 2-4d,mccp, dicamba (liquid form) to control the winter annuals. Good rule of thumb for when to apply pre emerge is when the forsythia blooms thats when to put it down. You need 3 days in a row of soil temps of 50 plus for crabgrass to start comming to life.

Think Green
02-24-2009, 09:33 PM
Esters? If the heat is in the 70's--is that a good idea?
What about the wind and relative humidity! Stick with the 3-way products and Triclopyr.(Read the label and apply according to what grass type you have!)
Just as tombo stated-" If you are seeing the Forsythia blooming already, then chances are your soil temps are at 52-55 degrees and Pre-M will probably not work or have time to act in time. IF you see any small crabgrass plugs, Dimension will control these as well as below ground sprouts. Look at Surflan too!