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Adult beetle and feeding damage
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Eggs
I found these awful creatures on my fritillarias yesterday; the adults must have just emerged. They showed up in our area a year or two ago, and can completely decimate lilies and fritillarias, and possibly some other plants such as Soloman's seal and solanums. For now I am going to try to control them by squishing the adults and the eggs by hand. They are easy to spot, being bright red, but the adults drop to the ground and hide when you disturb them. Keep a close eye on your plants, because once they get going they are voracious, and the larvae that hatch from the eggs are even worse than the adults. Cornell recommends this fact sheet for further information:
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http://www.umassgreeninfo.org/fact_sheets/defoliators/lily_leaf_beetle.html