Leaves/Fooliage Problem - What Rose is this?

[kevinschoppe]

I have a few issues with leaves compisition. Some of the leaves are yellow and green, while others have leave cutter damage maybe?

I have posted the pictures opn the bottom of my website. https://info.conroeisd.net/~kschoppe/ Let me know what you think.

I also am wondering what the name is for the a couple of roses are. I have heard on of the roses called cabbage rose, but I think it is called Austin Rose. I also have mini rose that someone called stars and stripes. I have not been able to verify this name. Pictures are on the my website.

Let me know what you think. Thanks for viewing.

Kevin

[The Helpful Gardener]

Cabbage rose (R. gallica) is a specific species whereas David Austins are a new group of hybrids (usually called English roses). I think it is most likely you have the latter anbd I'll bet it's 'Gertrude Jekyll'...

ALL your various leaf problems are fungal; at least two and most likely three different species (powdery mildew (your crystals), black spot (yellow lower leaves) and shotgun fungus (or something much like it; both the holes and the leaf "cut")). The fungus on your mulch is a sapprophitic mold that is trying to break down the hardwood in there (a bit too much left from previous years; I'd rake it out and use fresh, although the mold won't hurt plants, hardwood robs nitrogen as it breaks down...).

Try compost tea for those fungal diseases; if they persist try neem oil and then on to stronger measures, but this overly prevalent use of fungicides is bad for other parts of the environment, and we're starting to see resistant strains out here...

[opabinia51]

I'm not versatile on Rose varieties but the photo(s) of the damage definately looks like there was an insect culprit. The organic way to solve you problem is to pay close attention to your roses and find out what insect is actually eating your plant and then, plant another plant that will either detur the insect pest or attract the predator of the insect pest.

Angellica is a good attractor as is Goldenrod (Solidago spp.) And if it is leaf cutter ants that you are referring to; these herbs supposedly repel ants: catnip, pennyroyal, peppermint, sage, and spearmint. Beware of the mint family though, they are very invasive. You have to keep on top of them or they will take over your garden.

[The Helpful Gardener]

Opa, which do you think is insect damage? I might give you the cut section, but it's old and the majority of cellular damage looked like a secondary infection. Am I off-base here?

HG

[opabinia51]

Well, you have me thinking now.... you may also be right but, the leaf with the oblong brownage looks to me like an insect has excreted some sort of chemical here.
The localized cellular damage makes me think that it is not a systemic problem in the rose like a bacterial or fungal problem would be.

[The Helpful Gardener]

Yet that shotgun fungus gets it's name from just that sort of damage... I am willing to listen to dissenting opinions here as I'm not 100% married to my diagnosis, but insect damage tends to connect and run in places and I'm not seeing that...

Scott