Managing Winter Weeds in Lawns - LSU AgCenter

Have you started using the winter weed cocktail?

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Have you started using the winter weed cocktail?

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I’m about to mix some Weed Free Zone, without Atrazine, to spray winter weeds popping up in landscape beds - I was remiss in not laying down pre-emergent herbicide in the landscape beds though I heavy mulch the beds for weed suppression but some weeds always break through.

I’m not seeing much in the way of winter weeds in the lawn as I did apply Specticle pre-emergent in early October - happy with what I’m seeing so far as this is the first time I’ve used Specticle for fall application.

I’m planning to apply late winter lawn pre-emergent, likely Prodiamine, in the lawn in the next few weeks - in the first week of February.

This been an unseasonably warm winter - in that context, need to look closely at and re-evaluate the “normal” recommended application dates.

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I’m not seeing much in the way of winter weeds in the lawn as I did apply Specticle pre-emergent in early October - happy with what I’m seeing so far as this is the first time I’ve used Specticle for fall application.

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Same here, not seeing much winter weeds after Specticle but do have some.

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This been an unseasonably warm winter - in that context, need to look closely at and re-evaluate the “normal” recommended application dates.

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I was about to say this has thrown everything off...I actually mowed last week as the grass itself took off the weeks around Christmas when we had highs in the 80's.

I've sprayed Clegg's winter cocktail once in November and once in December and it's been holding up well. There is such a thing as over spraying this time of year correct? I was thinking about holding off on spraying until mid to late February.

I put out some annual ryegrass, in my Zoysia, to help cover some muddy bare areas. Any way to treat weeds without nuking the rye?

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I'll be following along since I did Specticle in Late September. I guess I need to be ready at the end of this month?

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I would say so and/or just monitor soil temperature LINK and when the 5 day average is near 55 F apply pre-emergent - of course it’s above 55 F now in Baton Rouge area - but then you still have the efficacy of your late Sept Specticle application - but I’m sure it’s efficacy rapidly waning after 4 months. I applied Specticle maybe a couple weeks after you that’s why I was thinking applying pre-emergent the first week of Feb.

I prefer to err on the side of applying a little too early vs a little too late.

I usually try to shoot an email to Dr. Ron Strahan LSU AgCenter to get his recommendation on whether or not adjusting application pre-emergent herbicide dates are warranted during “unusual” seasons -I’ll probably do this later this week or early next week. I’ll update when I do this and hear back from him.

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put out some annual ryegrass, in my Zoysia, to help cover some muddy bare areas. Any way to treat weeds without nuking the rye?

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Weed Free Zone (Speedzone) and Trimec is labeled for broadleafweed control on perennial rye and Zoysia but annual rye is not listed. I truly don’t know.

ronk might be able to shed better light on this - I recall he did answer a similar question a few months ago.

You’ll need to be ready to treat poa in the next month or so. Specticle is the best pre em on the market but even it will breakdown.

Site One for me.

Yeah I had looked at it last year but the price scared me off. I wish there was a pre-emergent that was effective on sedges and kylinga.