Diagnoses? A few problems here..

12 years ago

Hello - I bought quite a few miniature roses from John's Miniature Roses awhile back. They are doing reasonably well in little pots. However in the past 2 weeks or so I've begun to see problems. I spray once a week with Neem Oil and am very careful to spray the top and bottom of the entire plant. My in-ground hybrid Ts had a botrytis problem this season with all of the moisture so I've been spraying them with a copper fungicide once a week if the temps are above 60. If I spray the hybrids I spray the miniatures as well.

Here is what I'm seeing:

It looks like this Rainbow's End has aphids on the bud there - but what is the white stuff below with the little white looking bug in the middle of it? Will Neem control these aphids or should I try something else? High pressure water sprays are what I've been trying but I have to be careful since the plants are pretty tiny.

A lot of my roses (including the hybrid Ts) are doing this odd chlorotic thing with no evidence of blackspot or botrytis on the leaves. Some of the plants DO have blackspot but I see a lot of yellowing in places where there is no obvious disease. Any idea what might be going on? It usually looks like this:

I'm not sure what is going on here. If this is sooty mold or the beginnings of black spot or maybe even botrytis. I'm not sure how it could be fungal since this plant was 100% green 2 days ago when I sprayed everything with Neem and a day later with copper.

A *lot* of my roses have these small areas of nearly translucent leaves. No obvious disease anywhere on some of the plants but just these little paper-thin spots in the leaves. I assume this is some kind of insect but I don't know what kind? Will the Neem not kill whatever this is? What would?

Another shot from a 'Hot Tamale' plant:

This pic is large because I don't know if you can see what I'm talking about but I've also seen lots of this very thin webbing stuff around the buds and I don't know if this is natural or mite-related? If you can't see it click through and download the original, it's easier to see when it is large:

Thanks a lot for reading and any advice. I can spray as often as is necessary and have been picking off any diseased leaves.. I really want these to look nice.

Sort by:Oldest

Comments (5)

michaelg
12 years ago
last modified: 9 years ago
I don't see anything here to worry much about.

1. The aphids and spittle-bug won't do serious harm, just wipe them off.

2., 3. Some scattered leaflets and leaves will just die for no evident reason. Ignore.

4., 5. The translucent windows are from rose slugs, small green worms feeding on the underside. Just wipe them off. Predators will often control them for you. Oil or soap sprays should work if you coat the worms, but wiping off is actually easier unless there is a huge infestation.

6. This may or may not be spider mites. Look with a 6x hand lens. Mites are normally found mainly on the undersides of lower leaves. I've only seen them on upper stems in the case of neglected plants grown indoors, especially in low wintertime humidity. It's possible this mini plant was infested when you bought it. Washing repeatedly with a strong spray of water will control mites effectively. Outdoor rains, humidity, and natural enemies usually keep them in balance. Use of chemical insecticides is the usual cause of flare-ups.

Good luck. Sounds like you are a good, attentive gardener. The main things to keep up with are blackspot control and water.
redshirtcat
Original Author
12 years ago
last modified: 9 years ago
Thanks for the help Michael. I had no idea rose slugs existed. I checked the plants thoroughly and don't see any little green slug or caterpillar-like things.

It's possible they were killed in the last spray but I will keep checking. In the process of looking for the rose slugs I *did* find some creatures on the underside of leaves and tried to get some closeups. These appear to be hanging by small threads from the leaves:

Here's a wider angle shot:

Are those maybe what the adults look like? I googled and the adults look more like actual flies to me.

I also found this other critter and got a closeup of him as well. It doesn't really look like an aphid and I don't know if he's causing any damage or not?

This one looks like a mosquito to me but I don't know my bugs all that well. Maybe it's a mature sawfly? This is the best pic I could get and it doesn't look much like them to me...

Anyway - I appreciate the help and will keep on top of the blackspot and watering for sure. My poor Hot Tamale just looks like it's being eaten into oblivion by the yet-to-be-found rose slugs...

Thanks!
Related Discussions
Need help diagnosing rhododendron problem (with pic)
Q
Comments (12)
And Brent, it's really better if you deadhead shortly after the flowers have faded, before they form seed pods so you might keep that in mind for next year. " I don't know if the plant was at all root bound or if there were any circling roots." Unfortunately, you may have no choice but to lift and look if you want to save your plant if it was planted too deeply and was rootbound. Can you probe next to it and see if in two years time the roots have expanded out into the surrounding soil or if they are still in the shape of the nursery pot? Henning - "Plants wilt and die slowly when their roots become blocked: Root strangulation - This is best prevented by proper root pruning when planting. If the plant is not too far gone, it might be rescued by digging and removing the soil. Then cutting any circling roots that may be strangling other roots. The roots need to be opened up. Any time the roots are exposed during this process, they must be kept moistened. Roots that dry out will die. "
...See More
Please help me Diagnose leaf problems
Q
Comments (14)
Dear lsst, I don't know whether this is any consolation, but I also garden in Zone 7b (SC) and have about forty young seedling camellias in gallon-sized plastic pots that look similar to yours. The leaves are spotted and brown around the edges. I'm hoping that they're showing cold damage and will recover in the next few weeks. The seed parents of our seedlings are 'Berenice Boddy,' 'Christine Lee,' 'Imura,' 'Leucantha,' and 'Lady Vansittart.' A few are from unidentified seed parents. A few of our older camellias that have been in the ground for a number of years show a little cold injury, most noticeably a variegated 'Adolphe Audusson.' We've also had a poor blooming season due, I think, to the drought and a couple of periods of extreme cold during which we experienced a couple of nights with temperatures near ten degrees Fahrenheit. 'Governor Mouton,' which is, for us, normally a spectacularly beautiful and dependable variety, had, at best, a mediocre showing this year. Our forty-four-year-old 'Governor Mouton' was fairly pretty, but not up to par. However, its foliage looks fine. Our camellias that bloomed best this season were two 'Magnoliaeflora' japonicas, a 'Flame,' an 'Adeyaka,' and a 'Pink Perfection.' I've got to make a trip out to the northside of the yard to check on the 'Diddy Mealing' and the 'Turandot' japonicas. Our very late blooming 'Pink Champagne,' or 'Camellian,' japonica has a number of swollen pink buds that look as though they will be gorgeous. However, the nearby 'Eleanor Hagood' and 'Yuki Botan' have had poor quality blooms. 'Imura,' which normally blooms well for us, has had a poor season. And even 'Berenice Boddy' hasn't been up to par. One of my favorite seedling camellias that is about forty years old was on the verge of opening a huge number of blooms just as one of the cold fronts swept through. It was blackened by the cold. It came up underneath a 'Lady Clare' and a 'Governor Mouton' in my aunt's garden in the 1960's and produces a profusion of imbricated and rose-form dark pink tinged purple medium-sized flowers. But not this year. _Mais c'est la vie_. Another sad note is that our 'Lady Clare,' which in normal years blooms from November till March, also bloomed very poorly this year. In the past few days, however, I've noticed a number of fresh blooms on it; and its leaves look fine.
...See More
Diagnose Connection Problem?
Q
Comments (27)
For anyone who may be interested in an update to my problem... I finally managed to get a Bhutan Telecom engineer to stand by my computer and actually see it disconnect from the internet. He hooked up his own very high-tech looking box to my cables and verified that the problem was theirs, not my modem/router. And from the very next night, I had continuous, 24 hour connection. I rang him to ask what the problem was, and he said that they dug up and replaced the old cable down the road (narrow diameter and many old repair joins). They replaced it with a new, larger diameter cable. So now, I only get a drop-out every couple of hours, and that for only a couple of minutes before it automatically reconnects. A pain when I'm on Skype, but pretty standard here. But he still cannot explain why it used to disconnect punctually at the identical time every night.
...See More
Need help asap with diagnosing new roof problem.
Q
Comments (5)
From the photo, it appears that the roofing material is a low end composition. The folded over piece is evidence that the seal tabs didn't and the wind got under it. The deteriorated condition of the shingles usually doesn't occur for fifteen years or so. Should the roofer not satisfy you contact the mfg.
...See More
york_rose
12 years ago
last modified: 9 years ago
The first two pictures are good guys. Those are lacewing nymphs hatching from their eggs. They're ferocious predators of pests like aphids.

Third picture is an adult female aphid, possibly one named Macrosiphum euphorbiae. The bloated and yellowish appearance of it might mean it's dying as a result of being eaten alive from the inside by an another sort of insect predator known as a "parasitoid". (Or it might not mean that. Was it walking around at all?)

I think the final picture is either a dead aphid or a molted aphid skin.

Look on the undersides of the leaves for small pale green "worms". That's where rose slugs hang out.
york_rose
12 years ago
last modified: 9 years ago
One caution on using copper spray as your go-to fungicide with roses.

Some roses can't tolerate it. One year before I knew this I sprayed a White Rose of York (Rosa alba semi-plena) with copper spray to control blackspot.

During the following two weeks the bush dropped all its leaves.

Make sure your roses tolerate copper fungicide before using it all over the bush. :)
redshirtcat
Original Author
12 years ago
last modified: 9 years ago
Thanks so much. I don't really know anything about insects of any kind. I'm trying to learn rapidly now that I see them all over. I thought for sure that those hanging eggs were trouble and I'm glad to know they are what lacewings look like (I ordered lacewing eggs on cards a few weeks ago, maybe this is the 2nd generation!).

Thanks again!

Diagnoses? A few problems here..

Comments (5)

michaelg

redshirtcat
Original Author

Related Discussions

york_rose

york_rose

redshirtcat
Original Author

COMPANY

BUSINESS SERVICES

GET HELP

CONNECT WITH US

Diagnoses? A few problems here..

Comments (5)

michaelg

redshirtcatOriginal Author

Related Discussions

york_rose

york_rose

redshirtcatOriginal Author

COMPANY

BUSINESS SERVICES

GET HELP

CONNECT WITH US

redshirtcat
Original Author

redshirtcat
Original Author