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katyajini

Why so much distress on Darlow's Enigma?

6 years ago


I have good few Darlow's Enigma in a row in my front yard along the street.


They have such an extraordinary amount of insect damage on them as well as fungus such as mildew ( I think).


First the pictures.

These pictures dont convey how extensive and acute the aphid infestation is.






I have aphids on my rose bushes in the back garden, but that is nothing like this. I can flick the tip with a finger and the aphids will fall off. here you can flick and flick, they remain, they are just dug in. And a tip in the back will typically have only a few aphids, here there are seemingly a thousand on a tip.


There are also mealy bugs o scale (?)



And mildew (?) everywhere. some other fungus as well.




The roses in the back have no fungus at all.


What is happening? I fertilized the Darlows' in the front exactly at the same times and the same way as the roses in the back. And I have them on the same care regimen as the back. I only water the Darlows differently. But I check the soil under the mulch often and it is moist, not wet or dry.


Why would the DE in the front attract so many aphids? And the mildew? I dont think this is a wet or damp area. It gets shade a large part of the day and then a lot of hot baking afternoon sun. Same with aphids. Wouldnt they want to get away from such strong sun? Then the mealy bugs? If they are mealy bugs: White slightly fluffy stuff. Wont a plant get mealy bugs if too dry? Then how do you get mildew and mealy bugs at the same time?


Why are the DE so plagued and unhealthy? Too little water? Too much water? The plants are inherently sick so they are susceptible? (They are growing well otherwise though.) The area has some kind of super infestation?


I dont understand why these roses only are so troubled. And DE are supposed to be very tough. The only thing that is really different from the others is the area streetlevel. And of course the rose.


If I took out the DE and planted some other rose would it happen again just like this?


Any ideas?


I dont mind at all doing the regular stuff to take care of the insects and fungus. But I am wondering if there is something systemic-ly wrong with this site that is leading to this problem that I should address. such as planting too close is for BS. The DE are not crowded.


Thanks!!

Comments (15)

  • 6 years ago

    I am shocked, Katya. DE is a set it and forget it rock solid wonder here. You say you water the DEs differently than those in back. What is the difference?

    katyajini thanked Sheila z8a Rogue Valley OR
  • 6 years ago

    I thought the same. Set it and forget it. Its not on the same soaker hose net work as the other roses.. They are planted on a strip of land below and in front of a retaining wall in our front area. One has to water it manually by going out there. Mind you these Darlows have lived through the years without any care. Not thrived but hanging in there. I dont know what diseases it had in those years.

  • 6 years ago

    I am pretty certain they were not suffering from lack of water.

  • 6 years ago

    Out here, drip irrigation (more like soaker) is better than hand watering. For DEs, I don't think they want pampering or pruning. I would stop any of that. I doubt other roses would be happy there either if this is the way the DEs are doing. I'm puzzled.

    katyajini thanked Sheila z8a Rogue Valley OR
  • 6 years ago

    I have been staring at the bed of DE from time to time all today. It does not morning sun but gets good hot sun from midday on. One end gets more sun than the other. There is plenty of sun so I dont understand the mildew. The only thing I can think of is that it dos not get morning sun so humidity from the night and morning dew does not dry up quickly and so the problems. But that is true for most beds areas that get only afternoon sun.

    No, its nothing obvious.

    Dingo, I dont think its something from the city....but I dont know.

  • 6 years ago

    Powdery mildew results from dryness as odd as that may seem. Try more water or spraying the leaves with water. I had a couple with this issue and diluted skim milk sprayed helped a lot. A very hot water spray has been tested and found to work also. I have dunked small roses in very hot water and it resolved the issue. Some roses are more prone, but I didn't think DE was one of them. Don't know what to say about the aphids. I had that two years ago and then they seemed to have reduced in number, but I can't recall if I hit them with a tobacco tea or not.

  • 6 years ago

    water Rx for aphids and PM

    katyajini thanked rifis (zone 6b-7a NJ)
  • 6 years ago

    Like you say Vap, I am inclined to think it must be dryness rather than dampness. Let me see how I can address this.


    Thanks!

  • 6 years ago

    Rifis: You mean water the soil and the leaves both right?

  • 6 years ago

    And mealy bugs!

    katyajini thanked rifis (zone 6b-7a NJ)
  • 6 years ago

    rifis: water it is. I think water will help a lot.

  • 6 years ago

    Katyajini so sorry to see your Darlow’s. I am also extremely surprised because it really is the toughest rose here also. I had a terrible amount of aphids early spring that looked just like that in many of my roses and the did not bother Darlow’s enigma. I also did what rifis just recommended, a good strong wash several days in a row. I then saw lady bug larvae (they look like little black and orange monsters) in the area and backed off from spraying (a week later they were all gone). So check for lady bugs and their larvae, if they are around it will get better soon. I also have tried the diluted milk Vapor suggested and it has worked great for mildew. Soapy water also helps, but be careful of the temps.


    katyajini thanked dianela7analabama
  • 6 years ago

    Katy,

    You could try digging down a spade's depth to see if the soil is dry ( or wet for that matter). That information will help you to know what to do.

    Cath

  • 6 years ago

    Are they right on the street? Do they salt the roads in the winter - not sure where you are - but that can be an issue here.