Please help Identify ...

2 years ago

I was doing my evening stroll in the garden when I noticed this unfamiliar growth on Celestial Night Rose. I's not sure if this is RDD or some kind of but, or fungi. Please help identify whats going on with my rose. Do i need to shovel prune it? Come one come all.

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Moses, Pitt PA, cold W & hot-humid S, z6

2 years ago

last modified: 2 years ago

If that many budded cane is a fresh, new basal cane that came up this spring,,such a very high bud count can be perfectly normal. It is for my Quietness bushes. It's not unusual for a robust basal cane or a cane from very low down on the bush, that just emerged, to terminate in nearly 40 buds on my Quietness bushes. It's a spectacular sight when such a cane blooms with as much as 6 blooms open at once.

Yes, that many buds looks suspiciously like rose rosette disease, but the other symptoms are not there. No need to jump the gun...wait and see...watch the bush like a hawk watches a plump hen. My hope and opinion is that what you are seeing on Celestial Night is normal, exuberant growth.

The lower photos show evidence of the dreaded Rose Midge Fly. Stems that should terminate in buds are stunted, burnt looking, with no, or grossly deformed buds, depending on when the female rose midge fly laid her eggs......when the growing tip of a rose has yet to form a bud, or any time thereafter until the bud at a growing tip is as big as a garden pea. After a stems buds are as big as garden peas the female rose midge fly looks elsewhere to lay her eggs. Maybe instinctively knowing that the tissue of more mature rose stem growth at the tip, as having a pea sized bud already there when she discovers it, knows it is too tough for her maggots to chew.

There is no organic means of combat ting the ravages of rose midge fly yet known to the rosarian's world. I spray with Bayer Complete Insect Killer. This year I am also using a turf type grub/ant/etc. granular insect control to kill the pupae, and possibly any emerging adult flies at soil (mulched), level.

Moses

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Comments (6)

Artist-FKA-Novice Zone 7B GA
2 years ago
I noticed a similar patterns of growth on one of my Drifts but only one very small stem, at the tip. Kind of elongated, nothing else on this one though.

I had another one in a different location with actual RRD symptoms and I took it out.

But this elongation you show here...I am not sure what that is either.

Maybe some side effect of Powdery Mildew? My Drifts had it quite a bit this season.
haku84_zone9 thanked Artist-FKA-Novice Zone 7B GA
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Artist-FKA-Novice Zone 7B GA
2 years ago
The elongated pattern is curious, I've seen the same thing on one.
haku84_zone9
Original Author
2 years ago
Artist - I saw your thread then went back out to double check my rose, there is no powdery mildew on this rose, now on blossomtime thats another story.

Moses - It does look like a new basal cane, the buds kinda looked like a witches broom so thats what alerted me to the dreaded possible RRD. I'll keep an eye on it.

Thank you both.
Lilyfinch z9a Murrieta Ca
2 years ago
Haku … since rrd is pretty rare here I’d say keep an eye on it . I have some weird spring growth too , almost as if my feeding the rose gave the cane energy boost and the rest of the rose needed to catch up . I think it’ll be ok later in the spring for you !

Also I wanted to say when I Blossomtime it got powdery mildew in the worst ways each spring! It was bad
haku84_zone9 thanked Lilyfinch z9a Murrieta Ca
portlandmysteryrose
2 years ago
Haku, you might try a post with RRD in the title to get attention, maybe even a post that gives a shout to StillAnn in TN. She’s a RRD expert here on the forum. The elongated spray looks odd to me. The only clustered roses in my garden that have produced that kind of long, wavy, multi bud growth were Cecile Brunner and Perle d’Or. But I am not an expert in early stage RRD, which is what slightly abnormal tip growth would be. Are you in CA near Lilyfinch? It’s encouraging that RRD is rare in that area! If you lived in someplace like Dallas, TX, I’d say at the very least, cut the cane at the base and watch the plant closely. RRD is everywhere in Dallas (where I frequently visited family recently). I remember Ann and other sources saying that RRD starts at the top with the vector mite arrival and works its way down the infected cane(s), so quick action can possibly stop the spread and save a rose. Please do not worry just because I replied with my extra cautious two cents. What Moses said about basal canes and funky new growth is so true. I have just seen so much RRD that I‘d really lean into feedback from someone like Ann. Carol
haku84_zone9 thanked portlandmysteryrose