Why wouldn't I want to use...

[Please_Be_Green]

Primo Maxx PGR on my residential property.

Homeowner who does all maintenance on 15k mainly KBG/RYE lawn. High Maintenance lawn. I enjoy doing the work to have the picture perfect lawn...

Last year I cut every 4th day almost religiously...

Last night I was surfing the Syngenta website and read the label for Primo Maxx. Seems like it's the perfect product for me who is striving to have the thickest, densest, dark green lawn on the block. Expensive, but it just seems like it could provide me so much....

And if it cut down my mowing needs to every 7th day to keep my turf carpet like... all the better.

Any advice is appreciated.

EDIT - Maybe because it may only be available in 10gallon containers? I see no mention of 1 gal containers on the website right now.

[greendoctor]

You can buy generic trinexepac(Primo) from JDL. It costs around $400 a gallon. Usage on cool season grasses is 1/4-1/2 oz per 1000. From what I have seen on warm season grasses, it cuts down on vertical growth enough that you can get a nice cut even if you are mowing every 7 days. In my area, it is useful on bermuda and zoysia that is maintained at 1/2" or less. Without it, the grass can scalp if cut every 7 days because the proper mowing interval is every other day. The other benefit is growth is redirected towards root and stolon development. That is why the grass is healthier and more drought tolerant. A product like this is one to use through a calibrated constant pressure spray rig. Variations in coverage show as uneven growth regulation and therefore appearance.

[Please_Be_Green]

Trinexapac-ethyl is that the same AI as PrimoMaxx? Is Lesco's Regimaxx really the same mixture as Primo Maxx?

I've found a single "post" that mentioned that it changes the texture of the grass and makes it actually sort of "stiff". Not the kind of grass which would be enjoyable to "roll around in".

It seems to me, that if a product can be put down (this one I may find a professional to supplement my fert program) which would promote lateral stem and root development during the the highest growth period, would be extremely beneficial for the rest of the season. Even one application to keep a thick dense turf and minimize top root growth during the spring makes logical sense to me... If fall is normally the time to thicken up root masses... would a spring growth spike not also be beneficial.

On the other hand...


I've read a few articles about accelerated top growth as the product wears off...

and

I'm also concerned about cell membrane thermostability of KBG and my turf becoming less heat tolerant.

[greendoctor]

Yes, Regimaxx is the same thing minus the Syngenta price. To me, cool season grass is much softer than what grows in the tropics. You want stiff, I'll show you Emerald zoysia. That can be like sitting on a pincushion with the points of the pins facing up. I am not too sure about finding a pro who would want to do your lawn with just an application of trinexepac. You are at the point where it is best and less headache to do it yourself. It is true that there is some rebound growth of the grass as the effect wears off. What you want to do with this product is the spray it monthly tank mixed with some liquid iron. The iron masks the slight yellowing that happens as the growth regulation effect kicks in, it is also good for grass to get foliar iron anyway.

[bif]

I don't know why you wouldn't want to use it....did I miss something....??

did someone tell you you shouldn't?

I use primo on my lawn occassionally,,,,works great....

Steve

[Please_Be_Green]

I found this abstract... but I'm not sure I'm willing to dump $30.00 to purchase it.



Trinexapac-ethyl influence on cell membrane thermostability of Kentucky bluegrass leaf tissue*1

This article is not included in your organization's subscription. However, you may be able to access this article under your organization's agreement with Elsevier.
Neil L. Heckman, , Garald L. Horst, Roch E. Gaussoin and Brett T. Tavener

Department of Agronomy and Horticulture, 377 Plant Science Hall, University of Nebraska, Lincoln, NE 68583-0724, USA


Accepted 21 May 2001 Available online 19 December 2001.

Abstract
Trinexapac-ethyl [(4-cyclopropyl-α-hydroxy-methylene)-3,5-dioxocyclohexanecarboxylic acid methyl ester] is a turfgrass growth regulator used to reduce clipping yields and mowing frequency. Kentucky bluegrass (Poa pratensis L.) plants treated with trinexapac-ethyl are less heat tolerant than untreated plants. Electrolyte leakage tests can determine cell membrane thermostability (CMT) of several species and is related to relative heat tolerance, but has not been used to determine differences in CMT in plants caused by the influence of the growth regulator trinexapac-ethyl. We conducted one experiment, repeated twice with an electrolyte leakage test to determine the influence of trinexapac-ethyl on CMT of Kentucky bluegrass. Kentucky bluegrass plants treated with trinexapac-ethyl had less CMT than untreated plants. This shows that an electrolyte leakage test for CMT can determine growth regulator influences on the heat tolerance of a C3 turfgrass.

[greendoctor]

Heat tolerance of turf is tied to potassium fertility. This effect the researchers were able to detect and measure is probably not significant in the real world. I do not see warnings on the label to not apply to KBG in warm weather. There is a blanket warning about turf under drought and fertility stress. Then again, turf that is starved and dried out would not have need of a growth regulator.

[FERT-TEK]

Yes, Regimaxx is the same thing minus the Syngenta price. To me, cool season grass is much softer than what grows in the tropics. You want stiff, I'll show you Emerald zoysia. That can be like sitting on a pincushion with the points of the pins facing up. I am not too sure about finding a pro who would want to do your lawn with just an application of trinexepac. You are at the point where it is best and less headache to do it yourself. It is true that there is some rebound growth of the grass as the effect wears off. What you want to do with this product is the spray it monthly tank mixed with some liquid iron. The iron masks the slight yellowing that happens as the growth regulation effect kicks in, it is also good for grass to get foliar iron anyway.

Regarding the slight yellowing, I was unaware that this would occur and now have a mild case of it after using my Z-spray to apply .75 oz/1000sf on a KBG and Rye lawn. Any suggestions now that it has occurred?

[bif]

liquid iron

[FERT-TEK]

Posted via Mobile Device

[FERT-TEK]

Hind-site being 20/20 I now believe I have dollar spot showing itself. As a preventative I applied Banner Maxx at its curative / preventative rate to control the disease.

FYI, the Midwest has been hit hard with rain this spring...every two days we get another storm coming through.

[greendoctor]

Regarding the slight yellowing, I was unaware that this would occur and now have a mild case of it after using my Z-spray to apply .75 oz/1000sf on a KBG and Rye lawn. Any suggestions now that it has occurred?

You would do well to apply the label rate of a foliar iron/micronutrient solution. I like to add 1/8-1/4 lb of N from Coron or Starline CRN solution to this. On your emerged dollar spot, applying propiconazole(Banner) on top of a PGR application might not be a good idea. I prefer 3336 for this usage. Too bad Emerald and Daconil are not labeled for residential turf. Those are the other fungicides not bearing a PGR effect.