[7824]

You can start that in 3 weeks. Until then, just mow.

 

[PFTanx]

You can start that in 3 weeks. Until then, just mow.

So before I light up the weed n feed dude…is the consensus that I probably didn't do this with my prodiamine app? I'll call Lesco tomorrow if I can find a number for them and get their opinion. But none of my research and scouring of the interwebs leads me to believe prodiamine will burn.

 

[jha4aamu]

You can start that in 3 weeks. Until then, just mow.

So before I light up the weed n feed dude…is the consensus that I probably didn't do this with my prodiamine app? I'll call Lesco tomorrow if I can find a number for them and get their opinion. But none of my research and scouring of the interwebs leads me to believe prodiamine will burn.

The prodiamine wont burn but the combination of the fert you sprayed and the 40-0-0 your lawn guy applied was likely too much for the grass.

 

[macattack]

Ask them what the 99.32% inert ingredients are.

 

[PFTanx]

You can start that in 3 weeks. Until then, just mow.

So before I light up the weed n feed dude…is the consensus that I probably didn't do this with my prodiamine app? I'll call Lesco tomorrow if I can find a number for them and get their opinion. But none of my research and scouring of the interwebs leads me to believe prodiamine will burn.

The prodiamine wont burn but the combination of the fert you sprayed and the 40-0-0 your lawn guy applied was likely too much for the grass.

This sounds plausible. What I sprayed was 3-18-18. He did 40-0-0 and it was 7 days after what I sprayed. I'm just wondering what of this combo would have over stressed the grass? I have heard of Nitrogen burning grass (obviously) but not so much P or K. Simple Lawn Solutions said due to low N in the 3-18-18 burning wasn't much of a risk, plus a straight 40-0-0 app didn't seem TOO out of bounds, but perhaps my lawn is telling me differently.

What has me very suspicious is the pattern in which the burned spots appear.

Has anyone seen anything like that? @g-man ?

 

[jha4aamu]

So before I light up the weed n feed dude…is the consensus that I probably didn't do this with my prodiamine app? I'll call Lesco tomorrow if I can find a number for them and get their opinion. But none of my research and scouring of the interwebs leads me to believe prodiamine will burn.

The prodiamine wont burn but the combination of the fert you sprayed and the 40-0-0 your lawn guy applied was likely too much for the grass.

This sounds plausible. What I sprayed was 3-18-18. He did 40-0-0 and it was 7 days after what I sprayed. I'm just wondering what of this combo would have over stressed the grass? I have heard of Nitrogen burning grass (obviously) but not so much P or K. Simple Lawn Solutions said due to low N in the 3-18-18 burning wasn't much of a risk, plus a straight 40-0-0 app didn't seem TOO out of bounds, but perhaps my lawn is telling me differently.

It really depends on how much actual N was applied to the yard and how. Spraying .5lbs of N/K via AS is more likely to burn than spreading .5lbs of N/k via AS. You typically dont want to apply more than 1lb of N/k per month. Do you know at what rate the lawn guy applied the 40-0-0?

 

[PFTanx]

The prodiamine wont burn but the combination of the fert you sprayed and the 40-0-0 your lawn guy applied was likely too much for the grass.

This sounds plausible. What I sprayed was 3-18-18. He did 40-0-0 and it was 7 days after what I sprayed. I'm just wondering what of this combo would have over stressed the grass? I have heard of Nitrogen burning grass (obviously) but not so much P or K. Simple Lawn Solutions said due to low N in the 3-18-18 burning wasn't much of a risk, plus a straight 40-0-0 app didn't seem TOO out of bounds, but perhaps my lawn is telling me differently.

It really depends on how much actual N was applied to the yard and how. Spraying .5lbs of N/K via AS is more likely to burn than spreading .5lbs of N/k via AS. You typically dont want to apply more than 1lb of N/k per month. Do you know at what rate the lawn guy applied the 40-0-0?

Good point, I'll ask him.

The 3-18-18 I applied I did 4oz gallon and 1 gallon per 1000/sq Ft. I used Simple lawn solutions lawn food. (Not in a hose end sprayed though) https://simplelawnsolutions.com/products/3-18-18

I'll find out what he did.

The pattern looks like drips at a regular interval, and doesn't seem like something that would be caused by anything granular

 

[7824]

If it was caused by a granular product, it probably just went down a little too heavy from the edge guard. I never met an edge guard I liked.

 

[PFTanx]

If it was caused by a granular product, it probably just went down a little too heavy from the edge guard. I never met an edge guard I liked.

No edge guards on my chapin rotary!

 

[7824]

That burn pattern, the perfect curve in particular, was caused by something coming out of a spreader on wheels or a sprayer on wheels.

 

[7824]

It could have been buildup of product on the wheels from being applied in wet grass. It looks like in the 4th photo, the burn pattern is right in line with wheel tracks.

 

[PFTanx]

It could have been buildup of product on the wheels from being applied in wet grass. It looks like in the 4th photo, the burn pattern is right in line with wheel tracks.

Spreader is a LESCO (chapin) 9012b

And sprayer is the chapin 97902 with a teejet tip on it.

Spreader as only been used for milorganite (2 months ago)and prodiamine.

the sprayer I did the 3-18-18.

Maybe I'm spinning my wheels, ultimately it doesn't really matter what caused it. Just that something did. Now I need to watch and hope it doesn't spread further and if it doesn't, hope it fills in.

 

[farfetched]

Is the 40-0-0 Yara Amidas?

I've been blitzing 1/2 lbs of N from that a week for 6 weeks or so now. About 2 weeks ago I noticed two ~18 inch streaks of straight dead grass about 4 feet from each other, and another small dead spot in a different area of the yard. No other spots on my 8K of grass. I also did a 2/3 annual rate of liquid prodiamine before the issue.

I'm tempted to blame my edge guard, but interesting that you don't have one.

 

[PFTanx]

Is the 40-0-0 Yara Amidas?

I've been blitzing 1/2 lbs of N from that a week for 6 weeks or so now. About 2 weeks ago I noticed two ~18 inch streaks of straight dead grass about 4 feet from each other, and another small dead spot in a different area of the yard. No other spots on my 8K of grass. I also did a 2/3 annual rate of liquid prodiamine before the issue.

I'm tempted to blame my edge guard, but interesting that you don't have one.

Hmmmm, this is interesting that we have the same symptoms. I'm not sure if it's yara amidas, I'll ask. But, that product does have the AS 5.5%. A quick search of the internet doesn't show me any other product with AS 5.5% and 40 nitrogen….

Very suspicious that you have the same thing going on.

If the weed n feed guy is an honest dude, and he finds other lawns with this issue, hopefully he'll let me know. Honestly, I don't even know that I'd ask him to fix it. I just want to know.

 

[PFTanx]

Another possibility I have to consider is my chapin push sprayer had a leak? I did put on a teejet nozzel and perhaps it wasn't secure or tightened all the way. Although, since it was only 3% N @ 4oz/1000 sq Ft, I don't think that would be potent enough to burn unless the leak was significant and I was moving slow. I got 12 gallons on my 13k sq ft and I most definitely wasn't moving slow.

 

[Lawn Noob]

Does Prodiamine burn? I put down Lesco Stonewall 0.68 on Friday (it's. 0-0-6). My lawn is about 13,000 sq Ft and this bag covers 14,800 sq Ft. I put it all down. I arrived back home today and found some very strange burn lines, or what I think are burn lines. What the heck? The other part that's weird is this was granular so I'm not sure how this would have happened.

The last two pics look wet and fungusy.

 

[PFTanx]

Does Prodiamine burn? I put down Lesco Stonewall 0.68 on Friday (it's. 0-0-6). My lawn is about 13,000 sq Ft and this bag covers 14,800 sq Ft. I put it all down. I arrived back home today and found some very strange burn lines, or what I think are burn lines. What the heck? The other part that's weird is this was granular so I'm not sure how this would have happened.

The last two pics look wet and fungusy.

I kind of thought so too. Could that be due to burnt grass soaking after a rain?

 

[g-man]

A leak from the sprayer equipment.

 

[PFTanx]

A leak from the sprayer equipment.

Makes sense. Now, I need to figure out if it was his or mine. Hard to think it would burn like that with 3-18-18 a week and a half after the application.

 

[farfetched]

Hmmmm, this is interesting that we have the same symptoms. I'm not sure if it's yara amidas, I'll ask. But, that product does have the AS 5.5%. A quick search of the internet doesn't show me any other product with AS 5.5% and 40 nitrogen….

I believe that's a proprietary blend so highly likely its the exact same stuff.

A leaking sprayer makes a lot of sense though certainly wouldn't seem likely to burn at 4oz/K. I had sprayed .3 lbs of N\K of the 40-0-0 shortly before my issue now that I recall. I was aiming for .2 of N, but went tot slow with a Teejet on a 4Gal backpack.

I don't want to muddy your topic here, but let me clarify my prior description (sorry for sunrise distorting the picture)



Those sets of dead spots (I raked out most of the dead blades) are on opposite sides of the driveway and when I spray, I do not set foot on concrete to avoid iron stain foot marks. There are no other dead spots between point A and B so if mine was from a liquid leak, it would have only happened when I was actually spraying and I've noticed no leaking from the wand when in use. What I have had an issue with recently is the consistently of the Teejet XR11004VS (super fine, wide mist nozzle) caused by buildup in the wand's filter. I'm probably shelving this nozzle for good due to the lack of reliability\sensitivity to buildup...and it's generally too windy where I live for it.

The burn in your second picture just has such a curve to it. Maybe there is an issue with the uniformity of a nozzle on one side?

From the granular perspective, my issue is near concrete too and perhaps the two long linear streaks were caused by me air blowing the excess 40-0-0 on the driveway back into the grass...and the other 2 little spots caused by me dropping the edge guard.