To use, simply follow directions on label. Rate of use: 4 1/3 ounces per 500 sq. Atrazine St. Augustine Weed Killer. Research at the University of Florida produced evidence that the herbicide was an effective selective weed control of both broadleaf and grassy weeds in warm-season grasses. In Europe, atrazine use has been banned because of concerns for its impact on ground-water quality.© Gannett Co., Inc. 2020. The thing that homeowners need to question is at what temperature do weed seeds sprout and at what temperature does the grass begin active growth?Your California Privacy Rights / Privacy PolicyOriginal content available for non-commercial use under a Creative Commons license, except where noted. Atrazine will most definitely kill St A. In all fairness to its manufacturers, I didn’t follow label directions and am paying the price.Bahiagrass is getting a step into my lawn. For many springtime weeds, seed germination begins when temperatures are consistently between 55 and 60 degrees for about a week. Go to Standardgolf.com and Go to products then click on Turf Products III The weed pro is there. Use on: St. Augustine and centipede lawn grasses. Signs of spring are on display from flowering azaleas, hawthorns and wild viburnums. This can affect the performance of some commercial fertilizer applications.You can see that if the product is placed early, it favors weed control but when applied later it favors grass growth. Its a wand with a foam tip on the end. Advertised via state radio networks in Florida and Texas in Spring 2006. It is a small problem now and before it gets crazy I would like to knock it out.Identification and History of Bitterblue St. AugustinegrassDoc, Sorry but I got nothing. I have tried Bonus S and a weed killer that will not harm St Aug but the darn thing wont die. Some plants are starting to grow while others are still at rest. And every other living herb it touches. Is it TARR or just bad idea of Winter Rye?Are you absolutely sure it is Bahia Grass?I use a product from Lesco called Riverdale Manor and it works great. Controls: Many common grassy and broadleaf weeds. Then take the proper actions to make sure, you get best results from the product with minimal unintentional consequences.For questions, email Keith Fuller at [email protected]. Covers 3,720 Sq Ft The application timing of pesticides are established by the Environmental Protection Agency because they have studied the residual time the chemical lingers in the environment. Here is the poor man’s approach. The active ingredient in most weed-and-feed products for St. Augustine grass is atrazine. Commercial and home applications include weed control in lawns consisting of St. Augustinegrass, centipedegrass, zoysiagrass and … The product label states you can apply an application in spring and another in fall. And every other living herb it touches. It is not actively growing until temperatures are above 70.When using a pesticide always read and understand the label. I’ll do a little research from my other sources and get try to get back to you.Paspalum grass for lawn | Walter Reeves: The Georgia GardenerI asked Lowes and the lady told me a liquid form of, “Atrzine” I hope I spelled that right. All rights reserved.Some misled gardeners will use weed and feed in spring and then apply an atrazine spray before summer. Put the plugger/pipe over the bahia and spray it with roundup or MSMA. It will be less effective, if at all, on existing mature weeds. Triazine herbicides, including atrazine and simazine can be used in early spring to stem lespedeza growth. Now for the important question: What type grass do you have in your lawn? (Atrazine is more likely to damage lawns, especially St. Augustinegrass, when it is hot). I did just that and my 22K ft(2)St Augustine front yard looks like a UNF testing plot for every kind of weed from Alabama to Zanzibar. Get roundup or MSMA and a sod plugger or 3″ piece of PVC pipe. I tried it but that darn Bahiagrass is still growing.How do you KILL Bahiagrass that invaded St Aug Grass The product label states you can apply an application in spring and another in fall. Kills dollarweed, sandspur, annual bluegrass(poa annua), spurge and other listed weeds. You can buy concentrated atrazine at Ace hardware, Wal-mart, Home Depot, etc. Atrazine became the most popular post-emergence herbicide for St. Augustine grass in the 1950s. The active ingredient in most weed-and-feed products for St. Augustine grass is atrazine. Control sedges with Basagran, Image, Manage or repeat applications of arsenicals.yes, I searched online and found pictures of it and it matches the garbage in my yard. Kills many broadleaf weeds; Also used in centipede grass; Provides suppression of crabgrass; Controls emerged weeds and weeds from seed Contains: 4% Atrazine . This limits the damage and should kill the bahia.Doc,Atrazine will work to control some weeds but don’t expect that it can be applied with impunity. Kills weeds…not the lawn. Its the best I can do for now…..Need help…live in DFW sodded Palmetto S/A last year looked great…over seeded Winter Rye…mow yard looks awful. History. Atrazine will most definitely kill St A. St. Augustine grass will resume growth once temperatures are consistently above 65 degrees. with little to no damage to the bent. 4% Atrazine Concentrate. I really do not want a Bahi/StAug yard but do not know what else to do?