What type of St. Augustine do you have? Do you spray Celsius and Certainty on it as a mix?

 

Im not sure what varietal it is, i should check some online guides, however I do not believe it is floratam. I have always sprayed celsius and certainty together as I have some minor spurge and kylinga.

 

you can get msm without dicamba in the form of "Manor". However, you'll feel like a drug dealer weighing it up. That stuff is grams per acre. Does a great job on stemmy weeds that other herbicides don't control.

As to sandspur, celsius is your best bet for post emergence. My advice, since you've already used your annual max, is to focus on pre-emergence over the winter. Prodiamine is labeled for it, but I find prodiamine is not as effective as specticle flo for almost everything anymore.

 

Thank you, I'll look into Manor. I do have a small scale I use for celsius/cert but that does sound like another level of needing to be precise. I'll be safe to use celsius come springtime, likely do a blanket app early spring hoping to kill off any Sandspur that escaped the pre-emergent before it goes to seed. Think I should take the advice of 'Bombers' as well for the split 4 pre-emergents applications a year. Have terrible infrastructural drainage in my old area, seems as if all the rain in neighboring areas ends up on my street.

I've seen specticle Flo mentioned on this site a few times, just read briefly about it more and will look further.

For warm season/St Augustine would using/alternating three pre-emergents be excessive? (Prodiamine/Pennant/ Flo) Any concerns for root-pruning or other concerns, or simply swap Flo for prodiamine?

 

Hitting a post annual max means you don't have a good pre-emergent plan in place (might have the right products, but not cultural practice). With ideal temps for weed emergence year round and washout type rain down there, I would split those prodiamine and magnum into 4 annual applications. Maybe also consider a 3rd pre-em (instead of buying another post) to rotate.

 

Atrazine will get them all

 

Im tempted by atrazine for Sandspur, as I believe I've read it is good quite for sand spur as both a pre-and post emergent. Think I may try to use it early spring if I fail to control it with other methods. It just seems like one of the worst lawn chemicals health wise from things I've read, getting into the water supply and acting as hormone disrupters.

 

Not sure about what trees and shrubs you have, but you cant broadcast Atrazine under the dripline. I assumed you were talking about spot spraying to kill those weeds off.

Next year you need to use different herbicides when is cooler and save the Celsius and Certainity for the summer months.

See this to get some ideas. Posting this saves me from typing. Even if your weed isn’t listed, look at the herbicides available for early season use.

 

@nicparker I agree. I think Floratam is the only one you really have to worry about with regard to products labeled for SA.

 

Now with Syngenta Recognition available you can also use Turflon Ester Ultra and Fusilade II in St Aug.

 

Im not sure what varietal it is, i should check some online guides, however I do not believe it is floratam. I have always sprayed celsius and certainty together as I have some minor spurge and kylinga.

I asked the variety just out of curiosity. I have CitraBlue and both times that I've sprayed a mix of Celsius and SedgeHammer, the CitraBlue has been dinged pretty hard. Celsius alone doesn't hurt it. I was wondering if you saw something similar with the Celsius and Certainty mix.

 

I would like to figure out the exact varietal but have struggled so far. When I have blanket sprayed a celsius certainty mix I've usually gone medium rate celsius and low-med rate certainty. I normally don't use a surfactant but believe I've used it once or twice in lower temperature situations.

I haven't noticed any substantial hit on the St.Aug with that, but I have noticed after that mix the grass growth stops pretty hard for a week or two, but no browning or anything.

 

citralue must be more sensitive to it. I don't think I've ever seen issues with celcius and certainty mixed at max rate

 

I've Hit My Max Rate of Celsius and Certainty and am looking to acquire a third herbicide to control primarily dove weed, dollar weed, chickweed, and Sandspur coming into winter, spring. Just beginning season 2 at my rental home so there's fairly high weed pressure, plan to put down prodiamine and pennant magnum in next few weeks, Jax FL.

I was looking at Fahrenheit, Image for Southern Lawns, both have dicamba like celsius so feel like using those two would be cheating around the laws. Would prefer to not use atrazine for environmental reasons, but sand spurs were a pain last year especially with having a dog.

What other herbicides would you use for St. Augustine?

Im sort of in the same situation. Also north florida. Also a dove weed problem. I have Bermuda. I put down celcius a month ago, it didnt even dent the doveweed, and Im going to put down more this week, then premergent soon and give up for the year. The weeds won this battle.

 

Marking this thread as VERY interesting!!!

I put down Celsius WG for the first time here in Venice FL a week ago on a 5% predicted rain day........radar clear for over 100 miles........ so yes it poured rain about 3 hours later? (frown)

I am going to order another 12 k sq feet of 'the drug' for my bermuda grass, hairy crabgrass, smooth crabgrass, large flower Mexican clover, threeflower ticktrefoil, slender yellow woodsorrel stuff growing on the lawn.

Interested in the Atrazine maybe?

I killed a LOT of my St. Augustine lawn with some 2,4D stuff when I was not paying attention and reading the 200 pages on the foldout to see the fine print.