Old 03-03-2014, 08:14 AM
stumpman stumpman is offline
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Join Date: Sep 2006
Location: central part of N.C.
Posts: 35
How long can Pre M last with out being watered in.

I sprayed Pre M on some lawns on Monday and Tuesday. There was a 50% chance of rain on Wednesday to water it in, but it didn't rain. Now 1 week later, it hasn't rained yet, but there is a 75% chance today. On the radar, we should be getting some in the next two hours. My question is how long will the herbicide last before it starts breaking down and how affective will it be? We only had maybe one warm day during this time and the rest have been chilly or cold.
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Old 03-03-2014, 08:46 AM
Chilehead Chilehead is offline
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Join Date: Feb 2007
Location: Stockbridge, GA
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Read the label.
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Old 03-03-2014, 09:04 AM
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turfmd101 turfmd101 is offline
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Sunlight is pre-m's nemesis as well as heat. Exposure to these factors are degrading. Chance of rain is not as important as how much water. You will require the amount of osmosis needed for distributing the pre to the top two inches of soil.
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Old 03-03-2014, 03:28 PM
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wildstarblazer wildstarblazer is offline
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Location: South Georgia
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14 days, after that control starts to go down.
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Old 03-03-2014, 03:38 PM
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ETM ETM is online now
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Location: Georgia
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14 for ganular 21 for tank mix is what was told by my mentor
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Old 03-04-2014, 04:29 PM
eggy eggy is offline
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Join Date: Mar 2000
Location: Seymour Indiana
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Seems to be a debate ( at least in this area ) about the first application and results with either the pre m in liquid form or granular. I have noticed good results with both. Typically in the spring you have good moisture and having the pre m worked in within the time the label recommends is no problem, biggest problem is getting the pre m down in time way,way to many put it down late...
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