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RE: [AZ] Please help - blight on my bushes

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  • Tricia Cook
    Yes, the photo of the bark scale is exactly it, thanks. From: azaleas@yahoogroups.com [mailto:azaleas@yahoogroups.com] On Behalf Of Bob Stelloh Sent: Friday,
    Message 1 of 5 , May 17, 2013

      Yes, the photo of the bark scale is exactly it, thanks.

       

      From: azaleas@yahoogroups.com [mailto:azaleas@yahoogroups.com] On Behalf Of Bob Stelloh
      Sent: Friday, May 17, 2013 12:25 PM
      To: azaleas@yahoogroups.com
      Subject: Re: [AZ] Please help - blight on my bushes

       

       

      Thanks for asking us.

      Take a close look at the crotches of the stems for little white
      patches. If you see some, and you scratch them with a fingernail and
      they show red inside, you may have "azalea bark scale" You can see
      pictures of that at
      http://www.pbase.com/azaleasociety/problems

      If you see that on your plants, an insecticide called Merit with the
      active ingredient imidacloprid applied at any time will kill them
      (after a month or so, as it is a systemic insecticide that must first
      be absorbed by the plant). If you can see some tiny bright red spots
      on the stems - it might take a 10X hand lens to see them - those are
      the "crawlers" that can be killed by washing them off with a high
      volume, high pressure water spray, or by spraying with insecticidal
      soap or malathion (if you can't see them, they are inside those white
      patches and won't be harmed, so there is no point in spraying until
      they come out and you can see them).

      Bob Stelloh Hendersonville NC USDA Zone 7

      On May 16, 2013, at 7:24 AM, Tricia Cook wrote:

      >
      >
      > Just noticed 4 of my azalea bushes (different colors) have got
      > blackened stems, branches, and no flowers are forming. What can I
      > do to save them and not have the others infected ? Please help,
      > thank you.
      > Long Island, NY Zone 5
      >
      >
      >

      No virus found in this message.
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      Version: 2013.0.3336 / Virus Database: 3162/6331 - Release Date: 05/17/13

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