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2018 Lawn and Landscape Thread

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14 minutes ago, Grumpy Camel said:

I spot treated with the Roundup that’s safe to use on grass.  No effect.

 

Will do.  Plan to mix up some Quinclorac and Methylated Seed Oil and spray this weekend.

Makes sense, that version of Roundup won't kill crabgrass or dallisgrass.

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One of my rose bushes suddenly started to show signs of what I assumed to be heat stress but the other one is doing ok for the most part. I regularly water but watered it again thoroughly and didn't see any sign of change. A few stems have green leaves that are wilting and curling. I am guessing rose canker but not sure how aggressive to be with pruning these back.

 

 

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Father in law’s yard has gotten in some trouble. Sprinklers go regularly. These look like tracks from the mowers. Grass is toast. Any ideas? They seem to think someone sprayed weed killer and then got it on the blade. I disagree. These are also the areas that get blasted by sun.

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On 7/19/2020 at 6:22 PM, kmac30 said:

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Father in law’s yard has gotten in some trouble. Sprinklers go regularly. These look like tracks from the mowers. Grass is toast. Any ideas? They seem to think someone sprayed weed killer and then got it on the blade. I disagree. These are also the areas that get blasted by sun.

I had that issue a few summers ago.  I think it had to do with me mowing during the heat of the day.  Too much stress, blades get mashed down by the tires.  I could be wrong, but that was my analysis.  Couldn't find any visible signs of disease or bugs. 

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On 7/19/2020 at 1:10 PM, Gourmand said:

One of my rose bushes suddenly started to show signs of what I assumed to be heat stress but the other one is doing ok for the most part. I regularly water but watered it again thoroughly and didn't see any sign of change. A few stems have green leaves that are wilting and curling. I am guessing rose canker but not sure how aggressive to be with pruning these back.

 

 

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Stem dieback on #6 for certain. The leaf curl makes me wonder if it is a root rot. Check the ones that are completely curled up like a cocoon. That's entirely possible. I had to cut mine back hard earlier this season. The standard rec is bleach or alcohol in between cuts. Hell with that. 409 or Lysol won't corrode my pruners and nukes fungus. Cut, spray or dunk, repeat. There is no consensus on remedial sprays. If you have something broad spectrum like myclobutanil, propiconazole, or thiophanate- methyl I'd use it. The curling could also be a response to the vascular system being compromised below it. 

If it's phytophthora it's going to take a rotation of phosphorus acid and mefenoxam, Agriphos or equivalent and Subdue GR. The liquid is much more expensive and it is 2oz in a hundred gallons, so like the never-ending roll of Xmas wrapping paper you can pass it along to your grandchildren. I can't remember if a bag is 25 or 30lbs, it's about $120. 

On 7/19/2020 at 6:22 PM, kmac30 said:

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Father in law’s yard has gotten in some trouble. Sprinklers go regularly. These look like tracks from the mowers. Grass is toast. Any ideas? They seem to think someone sprayed weed killer and then got it on the blade. I disagree. These are also the areas that get blasted by sun.

It's definitely not herbicide. It's  not that durable on a blade. Look for gray leaf spot. Do the coffee can trick to check for chinch bugs. Not in the dead areas for either. Scout the adjacent areas that are still green. There is a good chance that it's just stress like @Spaulding Smails said. Tell him to run a water check. Throw out some cat food, tuna fish cans or whatever and run his regular watering.  Then go see what they caught. And then go dig a divot. See how far down it got wet.

Gut says gray leaf spot. That can be spread by the mower. Running around with inoculation loops for wheels. It's pretty distinctive on the leaf blades. 

 

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I planted a Monterey Oak last year and it dropped almost all of its leaves a few weeks ago.  I think the soil around it isn’t draining well, and I’m thinking of digging out “chimneys” around the drip line and filling with sand.  Bad idea or nah?

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Posted (edited)
On 7/13/2020 at 11:35 AM, TexasEd said:

ID?

 

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Anyone, Beuller?

@cactusflinthead?

It does not die with the normal stuff, it's in Bermuda and I'm using a braodleaf killer.  It also will root the stems (stolons)

Edited by TexasEd

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20 minutes ago, TexasEd said:

Anyone, Beuller?

@cactusflinthead?

It does not die with the normal stuff, it's in Bermuda and I'm using a braodleaf killer.  It also will root the stems (stolons)

I think it's a kind of crabgrass. If you can find a seed head it will help ID it.

I'd hit it with quinclorac or a low rate of glyphosate. I'm becoming convinced that the results of glyphosate and MSMA are nearly indistinguishable. You can try Celsius too if you have it on hand. 

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1 minute ago, cactusflinthead said:

I think it's a kind of crabgrass. If you can find a seed head it will help ID it.

I'd hit it with quinclorac or a low rate of glyphosate. I'm becoming convinced that the results of glyphosate and MSMA are nearly indistinguishable. You can try Celsius too if you have it on hand. 

Thanks, it grows next to the Crabgrass in some places but left alone in a garden bed where it is not mowed it can create a mat that is 8-10 inches thick where the stems weave themselves together and root anywhere they touch the ground.  It's growing pattern is closer to Common Bermuda but the leaves look like crabgrass just the stems and roots don't.

Aggy doesn't have it on this page: https://aggieturf.tamu.edu/turfgrass-weeds/

Looking in other places to see what I can find.

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