re: Is it time for pre emergent in South LA?

I don't think there's any actual water flow. I just went out And did a little walk around. I think these granulars are heavier than I thought.

The crabgrass in yard (South Louisiana) has just started appearing in the last few days. I got some Barricade last week before the crabgrass popped up, but it’s been raining all week so I wasn’t able to put it down yet.

Is there any benefit to using Barricade at this point? Or is it too late to worry with?

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I don't think there's any actual water flow. I just went out And did a little walk around. I think these granulars are heavier than I thought.

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Though I can’t say for sure either, i thought I’d do a little a little internet check, as I’m sure others might have the same question, and I found this article on the subject from NC State University. LINK. Did you use prodiamine, as it seems to have to have the highest affinity for binding with soil, and Dimension is in the middle of the pack.

However, if I was to take an educated guess based on the info in this article, the fact that you watered it in on Fri, after application, and Sat before this heavy rain, you likely got good binding of the pre-emergent with soil prior to the heavy rain and you very likely will be fine, particularly if you used prodiamine. You could also go get a little rye grass seed, maybe even something like turnip or radish seeds, spread it in a few small areas in the lawn to see if germinates, and if not, your good.

Used Hi-yield Turf & Grass w/ Dimension. I think it's ok. Went out to the flooded area.

Right on. Thanks for the help. I'm ready for this Zoysia to start growing so I can work on these low spots.

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CrawDude
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Dimension has some post-emergent control. Get some of that instead of prodiamine

I agree, Dimension pre-emergent offers some post-emergent control of young crabgrass up to the 3-leaf stage. Purchase that and apply it ASAP, and save the Barricade and apply this fall for winter weeds. Or even in May if you want a 12-month pre-emergent weed barrier.

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Thanks guys!

I’m new to the pre-emergent world and this thread has been extremely helpful

With fertilome or any weed killer spray, is there a temperature where it's too cold to spray and will reduce the effectiveness? The only thing I can find during my quick glances have been where the product says don't spray if hotter than 85-90 degrees.

Can someone school me in this stuff? Just bought a house and the yard is full of clover, crabgrass and various other weeds. Will pre emergent get rid of this stuff or do I need more serious help? TIA

Finally got around to getting to Cleggs to get preemerg today. Will hopefully spread it in the next day or so before a rain

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Sorry if this has already been asked but for the winter weed cocktail how long does it need to dry before rainfall?

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Usually many herbicides will become “rainproof” within 45 to an hour depending on heat and humidity, but Weed-Free-Zone says several hours on its label, and atrazine 1 to 2 hours, so you should be fine if you have no rainfall within several hours of spraying.