re: Late winter pre-emergent application:

quote:

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1. When are you other South Alabama guys putting down this round of pre-emerge? Should I go ahead and do it now since it’s already on-hand and temps hitting 70+? Or wait another week and apply in Feb?

2. Should I go back to the Prodamine for round 3 in mid-March? Or go with something else?

3. Anything extra I can put down now to ensure that god awful lespedeza doesn’t show back up?! Or will these rounds of Prodamine and Dimension handle?

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1. Being you are basically the same latitude as Baton Rouge, I wouldn’t see any issue putting it out now or waiting to the first week of Feb. Frankly, I’d try to time ithe application anytime between now and the the first week of Feb right before a rain b/c the pre-emergent needs to be watered in anyway.

2. & 3. mid-March seems a tad early for a second application, usually mid-April/early May or when soil temperature is projected to to 70 F. According to the LSU AgCenter the pre-emergent isoxaben is recommended for Lespedeza, not prodiamine or dithopyr (Dimension). LINK. So for the second application consider using isoxaben rather than Prodiamine or dimension.

For example, Doveweed is a major summer weed problem for me but Prodiamine and Dimension offer poor control so in my case I’ll be applying Specticle pre-emergent in by mid-April as my second application to target the doveweed (and other weeds) following my first week Feb application of prodiamine.

One of the H&G posters linked this useful site last year for estimating projected soil temps. LINK