[Nkoehn22]

Hello everyone,
Has anyone had success using Certainty Herbicide against Blue Grass (Poa Annua) I was to late in Virginia applying an
pre-emergent this fall/winter to prevent this annoying weed. I just put my order in for this item and was curious if anyone used it. The cost vs how much you use actually use is pretty decent. It also did'n't tell what the re-entry period is for residential use is, but it gave 12 hours for agricultural use. I'm wondering if the same time frame applies for residential use.

I could use some help please...

 

[Movingshrub]

Are you trying to control Kentucky Bluegrass (poa pratensis), Annual Bluegrass (poa annua), or both? Your previous post said you're trying to remove Kentucky Bluegrass.

This tool can be used to determine which herbicides work against which types of plants.
http://www.mobileweedmanual.com/search-weed.aspx?SpeciesType=Turfgrass&PrePost=Post&TurfGrass=1&OrnamentalType=&Ornamental=&OrnamentalName=&WeedType=Grassy&WID=70

Several people use Certainty. The Certainty label notes that results are best when poa annua is in early stages of growth and prior to tillering.

https://secure.caes.uga.edu/extension/publications/files/pdf/B%201463_2.PDF

There are other products, at varying price points, that will eliminate poa annua.

 

[Nkoehn22]

@Movingshrub Sorry my fault, its Annual Bluegrass (poa annua) After researching some products vs the cost and effectiveness from other peoples reviews I went with Celsius WG the (10oz version) on Amazon for $110.00

The others products were Dimension 2EW, Atrazine 4L & Certainty.
I subscribe to Allen Hane (LAWNCARE NUT) who has a ton of followers and has been in the business for a long time.)
He suggested Celsius WG for Bermuda and Zoysia,, I have Zoysia. I still didn't see much about Re-entry and / or drying time.
I have two kids that like to be outside a lot, but I need it to be safe for them to play on.

Thanks again for the advice!

 

[Mightyquinn]

@Movingshrub Sorry my fault, its Annual Bluegrass (poa annua) After researching some products vs the cost and effectiveness from other peoples reviews I went with Celsius WG the (10oz version) on Amazon for $110.00

The others products were Dimension 2EW, Atrazine 4L & Certainty.
I subscribe to Allen Hane (LAWNCARE NUT) who has a ton of followers and has been in the business for a long time.)
He suggested Celsius WG for Bermuda and Zoysia,, I have Zoysia. I still didn't see much about Re-entry and / or drying time.
I have two kids that like to be outside a lot, but I need it to be safe for them to play on.

Thanks again for the advice!

Once Celsius has dried it is safe for people and pets and for any irrigation and rainfall :thumbup:

RESTRICTIONS
1. Do not apply more than a total of 7.4 oz (210 g) of product per acre (0.17 oz or 4.8 g of product per 1,000 sq ft) per year (365 days).
2. Do not apply this product by air or through any type of irrigation system.
3. Do not apply this product on turf exhibiting injury from previous applications of other products.
4. Apply this product only to established turf unless otherwise noted on the label.
5. Some ornamentals may be sensitive to this product. Do not plant ornamentals or bedding plants in treated bare
areas for at least 30 days after the last application of this product.
6. Avoid application of this product near the roots of newly planted ornamentals.
7. In order to minimize risk to sensitive areas (water bodies or non-target plants), apply by broadcast application
(boom-type sprayers) only when the potential for drift to adjacent sensitive areas is minimal (e.g., when the wind is 10 mph or less and is blowing away from the sensitive area) and maintain a 25-ft buffer between the point of direct application and the closest downwind edge of adjacent sensitive areas.
8. Keep people and pets out of the area during application.
9. Do not allow people or pets to enter the treated areas until sprays have dried.
10. Do not use this product on bahiagrass or cool-season turf types, including tall fescue, fine fescue, Kentucky
Bluegrass, perennial ryegrass, or creeping bentgrass.

 

[Movingshrub]

@Movingshrub Sorry my fault, its Annual Bluegrass (poa annua) After researching some products vs the cost and effectiveness from other peoples reviews I went with Celsius WG the (10oz version) on Amazon for $110.00

The others products were Dimension 2EW, Atrazine 4L & Certainty.
I subscribe to Allen Hane (LAWNCARE NUT) who has a ton of followers and has been in the business for a long time.)
He suggested Celsius WG for Bermuda and Zoysia,, I have Zoysia. I still didn't see much about Re-entry and / or drying time.
I have two kids that like to be outside a lot, but I need it to be safe for them to play on.

Thanks again for the advice!

I've watch a whole lot of the LCN's videos as well.
I have kids and a dog, so I share your concern about the chemicals being family friendly.

Controlling poa annua is a multi-step process.
1. Make sure you get your pre-emergent such as prodiamine, dithopyr, pentimethalin, etc. down in Sep/Oct.
2. There are post-emergent options such as monument, revolver, katana, and celsius. All of those are compatible with Bermuda and Zoysia although some play well with St Aug and Centipede and some don't. Each product is at a different price point. Each product has it's pros/cons of effectiveness against different weeds.

Also, if you haven't done so yet, I would highly encourage you to apply a blanket/broad cast application of pre-emergent now to control grassy weeds for the summer.

 

[Nkoehn22]

 

[Nkoehn22]

What I'm hoping is once I spray with Celsius WG and it kills off the Poa, that my Zoysia will continue to take over. Unfortunately I created this issue by not applying the necessary pre-emergence at the proper time. Well lesson learned and hopefully the zoysia just will continue to grow right over the dead poe once it really wakes up. I really hope all my hard work last summer can still be salvaged. (Fingers Crossed) I never had a problem like this when I renovated my front yard.

 

[Colonel K0rn]

Might be a little late in responding, but I had decent results with Celsius and Certainty blanket spray on my lawn that was loaded with Poa Annua. I noticed chlorosis of about 80% of the plants in 2 weeks, but the temps have been in the high 60's-low 70s since I sprayed. Today it was in the mid 70's, and I'm still seeing some die-off from the spray, but not having as good results as I would have expected when the temps are above 80°F.

Celsius takes some time to take effect, so be patient. The main lesson I learned that is going to help me win the battle with Poa in my lawn is to make sure that I get my PreM down. I didn't last year, and I paid the price for it (so did my reno). I won't make that mistake again.

 

[Nkoehn22]

@Colonel K0rn I just sprayed my yard with Celsius this past Saturday March 10th, the temps were in the 40's this weekend and its suppose it be in the 60's by next weekend. I sprayed the max per 3 gallon tank from what the CELSIUS PDF said. About a moth ago I did spray Sedge Ender and it did have some effect on the younger poe and other winter weed. I just hope this summer that my zoysia plugs will overtake the Poe Annua and fill in a lot more. Year two I saw a drastic improvement with my front yard filling in, hopefully i'll have the same results with my backyard. FINGERS CROSSED!

 

[Movingshrub]

Any chance you took before and after photos? I am curious to see how successful Celsius is for your situation, considering the 40F temperature.

 

[Colonel K0rn]

@Colonel K0rn I just sprayed my yard with Celsius this past Saturday March 10th, the temps were in the 40's this weekend and its suppose it be in the 60's by next weekend. I sprayed the max per 3 gallon tank from what the CELSIUS PDF said. About a moth ago I did spray Sedge Ender and it did have some effect on the younger poe and other winter weed. I just hope this summer that my zoysia plugs will overtake the Poe Annua and fill in a lot more. Year two I saw a drastic improvement with my front yard filling in, hopefully i'll have the same results with my backyard. FINGERS CROSSED!

Also, were you able to get any type of PreM down so far this year?

 

[Nkoehn22]

This picture above was about a month ago before I sprayed. Yes I did put a pre-emergent down I did a granular in the fall, but its look like I missed my window for it to be effective. I put down Scott's crabgrass annual grass prevent and I also sprayed Sedge Ender a month ago and that's a pre-emergent for poe annua. I'll try take a current picture ASAP and post the progress.

I just got this feeling that when we get everything the way we want it from the house to the yard, it's going to be time to sell it and then start the process all over! Lesson learned about missing pre-emergent and not putting down some sort of prevention before putting plugs and or seed down.

 

[Movingshrub]

This picture above was about a month ago before I sprayed. Yes I did put a pre-emergent down I did a granular in the fall, but its look like I missed my window for it to be effective. I put down Scott's crabgrass annual grass prevent and I also sprayed Sedge Ender a month ago and that's a pre-emergent for poe annua. I'll try take a current picture ASAP and post the progress.

I just got this feeling that when we get everything the way we want it from the house to the yard, it's going to be time to sell it and then start the process all over! Lesson learned about missing pre-emergent and not putting down some sort of prevention before putting plugs and or seed down.

Just to make sure - IF you ever were to seed, you need to be strategic with your pre-emergent application, cause otherwise the pre-em would kill the seed as its germinating.

 

[Nkoehn22]

Thanks, I'm aware of that but a reminder is always nice. I'm a huge believer and fan of Meyers Zoysia grass. I did the front yard with plugs and over the past 2 1/2 years its has filled in and it turned out great! Here is the link of what we've done so far.
https://www.icloud.com/sharedalbum/#B09G6XBubNDtp

Whenever we decide to move, the new owners will have a much nicer yard then what we first had.

 

[Nkoehn22]

I'm starting to see signs that Celsius is working on the weeds in my yard, dead spots are starting to show on poe but it's definitely works slow on poe and any other grassy weed. On non grassy weeds its already taking effect on killing weeds. I did spray on March 10th and the temps have been cool for the most part, so I guess I really can't expect a whole lot at this point. Hopefully once the weather starts warming up and stays warmer on a consistent basis i'll see a big improvement. Since I did have a good amount of annual blue grass in my backyard, I did apply the recommended maximum dosage for a 3 gallon sprayer. To make it easier to remember and see where I sprayed, I did mark off spraying rows with marking flags that I got from Lowe's for a cheap price.

I'm looking forward to another summer and seeing how my yard grows and take shape. Redoing this yard has been a work in progress the last four years. We hauled six truck bed of leaves, branched and pine needles then removed 9 trees, took out and old shed, put in two gardens, put in a playground area for the kids, put in a new shed, redid the deck then painted it along with a sealer. We extended the patio with cement pavers connecting it to the deck. With help I plugged the front and backyard with Zoysia plugs, put in/fixed up 6 flower and or plant & tree beds. It would of been done sooner but having a young family and limited budget played a huge factor. From where the yard was when we first started to today it's a drastic improvement and i definitely have learned a ton in the process.

 

[Movingshrub]

Glad to hear it's heading the direction you want. Keep it up.

 

[Bunnysarefat]

Wow you've done a lot of work. I know your plugging job was one for the internet hall of fame for sure. It may have taken longer than you'd of liked, but sounds like it's been rewarding work. Sometimes the joy is in the work itself.

 

[Colonel K0rn]

I got tired after reading your last post! You've been a busy man, and you're right, it is rewarding when you see your projects come out looking good several months/years after you start.

I was walking my lot today, and we got 0.4" of rain yesterday, which was helpful. As I was walking, I started noticing more and more black spots on the ground, where there used to be weeds, but I can't recognize them any more. Sure, the poa is still there, and looking ugly AF, but there are a lot more that are dying, and some that are half dying/with new growth... crazy strong stuff. Going to be a multi-year battle to get this weed under control on my lot, with a limited budget as well.

 

[Nkoehn22]

Here's an update on my annual blue grass problem. About 3 weeks ago I sprayed Celsius, and applied the maximum amount for a three gallon tank. After applying the next day we had rain with temps in the upper 40's tolow 50's. The three weeks after it's been much the same with an occasional day in the low 60's. But this past week I really started to see some results on the blue grass. I may need to re-apply a second application after a decent time has passed but I'm crossing my fingers one application will kill a lot of it annual blue grass off. Also my Zoysia is just starting to wake up, I already did a scalp on the front to help promote growth of what has woken up.

 

[w0lfe]

Do you think Celsius or certainty is better for poa annua?