Strange foamy substance on lavender plants

suebee_2007May 31, 2007

I am very puzzled by this. I recently noticed a very strange white foamy substance on my lavender plants. I first thought it is sap/secretion from a tree, but it is on all the lavender plants. Looks like white foamy saliva -- yuck. Does not seem to be hurting the plants in a serious way, but I must say, I have never seen this before. These lavender hidcote bushes have been in the ground for 3 years and this is the first time I have seen this. Any ideas/clues?

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Heathen1(10a)

Sounds like spittle bug to me! You can just hose them off.

Here is a link that might be useful: Spit bug

    Bookmark   May 31, 2007 at 8:52PM
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neil_allen(z5/6 Chi IL)

I agree with heathen1. They're very common on lavender for some reason. I've never seen enough on one plant to do it serious damage, but they can distort the stem they're on, so if you want the maximum flowers from your plants, get rid of the bugs.

    Bookmark   June 1, 2007 at 7:53AM
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granite(z6 NC)

Spittle bugs....don't just hose them off, squish the bug that's in the center of the foam.

    Bookmark   June 2, 2007 at 7:29AM
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thesquintysquid

Could it not be frog sperm?

    Bookmark   June 4, 2007 at 10:39PM
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lavenderforluck(z5CO)

Hose them off well and use some form of organic pesticide i use Pyrethrum

    Bookmark   June 6, 2007 at 7:42PM
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rhizo_1 (North AL) zone 7

No need for the pesticides....just use a hose and your fingers. Pyrethrins and pyrethrums are pretty toxic broad spectrum pesticides.

    Bookmark   June 12, 2007 at 2:57PM
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italiangardner(9)

Wow that is strange I came here tonight to post a question about the same "spit" only its on my rosemary plants that are also well established...
these were all over the plants (5 of them) I have grapes growing very near them should I be worried about the grapes?
Thanks for any help

    Bookmark   June 13, 2007 at 3:26AM
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ksrogers(EasternMass Z6)

Spray the grapes with neem and they should be fine. Grapes usually have only disease issues, but bugs do chew the leaves too. Sometimes these 'spits' are insect eggs and will hatch soon.

    Bookmark   June 13, 2007 at 1:04PM
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