Triple Oaks Nursery User Forum: Mildew?

Philadelphia Area Nursery - Triple Oaks Nursery

Mildew?

Posted by JerseyMike on September 15, 2009, 18:12:35

I'm not really sure what I have here, but it's not powdery mildew. Doesn't appear to be a insect either.

Water stream knocks this back for a brief period, but it comes right back. I've been using Neem oil, but that appears to be having little impact as well.

This has impacted all of my Itea virginica in a mixed bed. The infection stays on the stems and never covers the leaves. And this is the first year I've seen this on this plant.

I've seen this type of infection on some of my Prunus Laurocerasus 'Otto Luyken' in another bed last year and the year before that, but it was mild and controlled with Neem

Two observations.

The all of the leaves on the impacted stem are experiencing accelerated leaf color change from green to bright red (typical for this plant, but way ahead of schedule).

The stem then quickly dies, as the leaves have withered away. Cutting back into the stem, reflects a dead stem (no green).

Any thoughts to what this could be and what organic steps I could take to get it under control?

Here's a link to excellent image I took today

Here's a link to the album on photobucket, showing various pics. The first pic is blurry (in the center), but the look at the bottom of the image, it will show the extensive spread.

http://s51.photobucket.com/albums/f353/jerseyreef/Mildew/

Message Thread:

Mildew? - JerseyMike September 15, 2009, 18:12:35
- Re: Mildew? no seems to be insect - lk September 15, 2009, 22:19:12
- Re: Mildew? - Joe K September 15, 2009, 22:25:53
  - looks like mealy bug - lk September 16, 2009, 9:25:12
    - Re: looks like mealy bug - Joe K September 16, 2009, 9:33:56
      - Re: looks like mealy bug - Ron (DE Zone 7a) September 16, 2009, 21:09:16
      - Re: looks like mealy bug - lk September 17, 2009, 7:22:19
        
        Re: looks like mealy bug - lk September 17, 2009, 7:30:56
        
        Re: looks like mealy bug - JerseyMike September 18, 2009, 17:09:04
        
        Re: looks like mealy bug - Joe K September 18, 2009, 17:35:38
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