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Thread: Star Magnolia

  1. #1
    I recently planted 2 Star Magnolia bushes.* My question is since planting them they have attracted wasps and yellow jackets.* Is this common?* The bushes are about 3' in height and I* am in NY.

  2. #2
    Join Date
    Sep 2003
    Location
    Maryland zone 7
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    Hi Emma,

    I'm wondering if what you are seeing are predatory wasps aka parasitic wasps.* They often look like yellow jackets and other wasps called paper wasps. These predatory wasps don't sting humans and help to eliminate other pests by laying their eggs on the bad pests.* Magnolia scale or aphids would attract them.* Look at the limbs, leaf petiole and leaves, especially the underside of the leaves for them.

    Predatory wasps - click on the pics for larger views:
    http://members.tripod.com/jimhammond/hymenopp.htm
    http://www.drmcbug.com/parasitic.htm
    http://cedarcreek.umn.edu/insects/al...teraframe.html

    Aphids come in many different colors from red to green to black to white to tan. In the second picture you will see ants and black aphids, mostly under the leaves.* The ants harvest the honeydew (waste) that the aphids emit.* You might see a clear or blackened mold on the plant from them.
    http://cedarcreek.umn.edu/insects/slides/021019as.jpg
    http://cedarcreek.umn.edu/insects/ne...21019artlu.jpg
    http://www.donnan.com/images/aphids.JPG

    Here's a yellow jacket look-alike.* It's actually a fly and not a wasp, yellow jacket or bee.* Note that it only has one pair of wings.
    http://bugguide.net/node/view/2838

    Look for magnolia scale on bark of trunk and branches.
    http://ohioline.osu.edu/hyg-fact/2000/2003.html

    You can use insecticidal soap (or make your own) for the aphids.* Spray every 5 to 7 days until they are gone.
    http://www.care2.com/greenliving/hom...idal-soap.html

    For scale insects you can use an organic horticultural oil called Organicide.* It's made from sesame seeds.

    Newt

  3. #3
    Hi Newt,

    Thanks for the info.* I think I have Magnolia scale which from what I read is attracting the insects.* I also believe that I in fact have the fly that looks like a yellow jacket as it only has 1 set of wings.* The plants were a gift so the person that bought them for me was unaware of what to look for, and since I have only had them for about 2 weeks they are still under guarantee.***I am going to the place where they were purchased and see what they are going to do.* I will keep you updated......and THANKS again for the help.

    *

    Emma** :)

  4. #4
    Join Date
    Sep 2003
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    Maryland zone 7
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    Emma, thanks for the update.* I think that returning them to the place of purchase is a good idea.* Thank you for letting me know.

    Btw, that yellow jacket look-alike fly is a good bug.* I forgot to say that.

    I'd love to know how you do a the garden center.
    Newt

  5. #5
    Newt,

    I called them this morning and they have a spray that I am going to try, i am going to pick it up on Saturday.* I have a year guarantee so we will see how they turn our after spraying.* The women i spoke with said the srpay will work.* We shall see.* I am going to question them about returning them if it doesn't work.* Not being a bee expert, the distinction between the yellow jacket and the "fly" yellow jacket is the number of sets of wings.....correct??

    :)

    Emma

    *

    *

  6. #6
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    Sep 2003
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    Maryland zone 7
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    Emma, I'd love to know what that spray is and what it's for.* Did they give you a name of the spray and confirm that you have scales?

    Newt

  7. #7
    Hello Newt,

    I just got back from the nursey and they sold me an Ortho product called "Systemic Insect Killer"* it "sontrols insects and mites".* They confirmed that it is scale [because I brought them a small branch with the scale on it].* The bottle states it does control scale.* The women at the nursey told me that it "gets into the*sap of the plant" and as the scale sucks on the sap it ingestes the poison and thus dies.* One of the links you sent me mentioned an insecticidal soap that may help.* Well it definitely helped eliminate the "bees", I have to treat the bushes 2 to 3 times and wait 7-10 days between applications.* So we will give*it a try and see what happens.* I will elt you know how it goes.

    Thanks again for all of your help I realy appreciate it !!

    :):):):)

    Emma

  8. #8
    Join Date
    Sep 2003
    Location
    Maryland zone 7
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    Hi Emma,

    I was wondering how your magnolias are doing now and if the spray you used has worked for you.

    Newt

  9. #9
    Hello Newt,

    Sorry for the late response, I have been very very busy.* Well I have done 2 applications [I have enough stuff to do a third, which will be this Sunday].* One shrub doesn't have any scale on it, the scale on the second plant has changed from a grey color to black [I am thinking this is good].* Overall the plants look healthier and there is definitely a huge difference in the number of ants and "bugs" hanging around them.* So, I would say my plants are much better.* Thanks again for all of your help and concern, it is really nice to know there are "good people" still around.

    *

    Thanks again

    :D:D:D

    Emma

  10. #10
    Join Date
    Sep 2003
    Location
    Maryland zone 7
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    Emma, I'm so glad to know that your Magnolias are doing better.* Keep up the good work and thanks for the compliment!* :D

    Newt

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