What is it? How do I kill it?

JonJuly 31, 2012

My Cedrus Deodara seems to be doing fine...

...except for this one branch...

....where I found over a dozen of these.....

...munching their way from the tip to the trunk.

I picked off the ones I could find (squashed them) and don't see any more, on any other branches with similar damage. I checked other trees and didn't see indications of more.

What is it? How do I kill it?

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pineresin

Maybe sawfly larvae. You can easily kill them they way you have already done ;-)

Resin

    Bookmark   July 31, 2012 at 4:35PM
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ken_adrian Adrian MI cold Z5

sounds like you already took care of them.. whats more to do??

check out the link ...

i have a quart spray bottle from the hardware.. with a lightweight pyrethrum spray.. and used to go hunting after dinner for such ...

if your conifers are small enough.. i dont know why you would need to go nuclear .. and bomb the whole place ...

ken

Here is a link that might be useful: link

    Bookmark   July 31, 2012 at 4:42PM
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Jon

Resin,

I think you are exactly right. I looked up pictures of Sawflies and those are the flies that would get all over my puppy's ears when I took her for a walk. Judging by the amount of flies that were around I may be very busy.

Those things are really annoying.

Thank you,

Jon

    Bookmark   July 31, 2012 at 4:45PM
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Jon

Ken,

If the hand-picking works and they don't go after a lot of other trees then it's not a big deal. I just didn't know what I was up against and how widespread it may be.

Jon

    Bookmark   July 31, 2012 at 4:49PM
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wisconsitom

They're sawfly larvae. They will be specific to their host plant, not general feeders. And yes, you have probably already nearly eliminated them.

I like Ken's idea of having some pyrethroid insecticide mixed and ready to go. Pyrethroids are relatively safe for the applicator and the surrounding environment when used in this way. Above all, overall nuclear options are not called for in such a case as this.

+oM

ps......do not, I repeat, do not get any spray drift from any pyrethroid insecticide in your eyes! It will hurt.

    Bookmark   July 31, 2012 at 6:13PM
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ken_adrian Adrian MI cold Z5

do not get any spray drift from any pyrethroid insecticide in your eyes! It will hurt.

==>> and that is why i smoke while i do it..

the wind is always at my back... lol...

ken

    Bookmark   July 31, 2012 at 6:29PM
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Jon

It seems as if the best thing to do is just keep checking around to see if they target something else. I agree it makes no sense to simply start blanket spraying of insecticides. I was surprised to see them go after needles like that, but the Deodara needles are very soft.
Thanks,
Jon

    Bookmark   July 31, 2012 at 9:35PM
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wisconsitom

Yep Jonny, there's a sawfly species for many if not most conifer species. Now for some fun, when you know you've got a branch of one of your plants loaded with them, sneak up on them and watch; They'll all freeze in place simultaneously! Loads of fun for the whole family.

+oM

    Bookmark   July 31, 2012 at 11:59PM
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Jon

+oM,

Exactly, I haven't seen any more, but when I first saw them I thought the green bunches were some sort of mutation in needle growth maybe caused by a disease. Much to my surprise, the "mutant needles" started wiggling when I touched them.

Jon

    Bookmark   August 1, 2012 at 8:40AM
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