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Weird eggs on Cissus quadrangularis

Posted by seedmoney 8A ( on
Sun, Jul 10, 11 at 23:08

Hi everyone,
I found these eggs on a Grape Veld, (Cissus quadrangularis) that I was propagating in my screened (apparently not too well!) greenhouse.
Were they deposited by a confused butterfly or are they something else entirely? All input appreciated. I've searched the literature but can't find any references to suggest that Cissus is a butterfly host plant. I should add I'm raising Black Swallowtails, American Painted Ladies , Gray Hairstreaks and Monarchs in there.

Here is a link that might be useful: weird eggs on Cissus quadrangularis

Follow-Up Postings:

RE: Weird eggs on Cissus quadrangularis

There are quite a few sphinx moths that use members of the grape family as host plants. I think just about all the the Eumorphas use grape family vines/plants, also Abbott's sphinx/Sphecodina abbottii, Lettered sphinx/Deidamia inscripta, Nessus sphinx/Amphion floridensis, and Hog Sphinx/Darapsa myron. They all make cute moths. I don't know which, if any, of them lay their eggs in large groups like yours did, so your eggs may not be sphinx moths, but it's a start.
I've included a link to a list of sphinx moths of America. You can click on each one to find a lot of information about each type. I'd scroll down and start on Eumorpha if I were you.
If, after the eggs hatch, they have horns on their rear ends, you know they're sphinx moths.

Here is a link that might be useful: Sphinx Moths of America

RE: Weird eggs on Cissus quadrangularis

I don't think that they are eggs at all, but something that the plant is exuding. The first clue to that, in my mind, is that the 'eggs' (droplets) are all located on or very close to a primary or secondary vascular vein.

I've seen this particular type of exudation on other kinds of plants, mostly those with calcium oxylate crystals in their sap. Which this plant contains, by the way.

What do you think of this theory?

RE: Weird eggs on Cissus quadrangularis

Wow! I love this forum---thanks for your input, misssherry and rhizo. I'll keep you posted on the outcome.

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