I have not yet been visited by the lily leaf beetles, but the topic came up on a recent post I did on the blog as well. https://awaytogarden.com/martagons-whats-not-to-love I suspect because I have VERY few lilies (like several clumps only on my several acres) and am in a very rural area without other host lilies in gardens for them to be lured to, I have been spared up till now. We shall see. That you and a commenter on the blog have raised the question has gotten me reading, and it seems that vigilant observation, hand-picking early and often, and perhaps the use of a Neem-oil spray on the larvae are somewhat helpful. Columnist Leslie Land of the NY Times addressed this succinctly a few years back: http://www.nytimes.com/2005/07/28/garden/28qna.html Gardener’s Supply also had an interesting fact sheet on it: http://www.gardeners.com/Controlling%20Lily%20Beetles/8090,default,pg.html A parasitic wasp is apparently providing good control in parts of Europe, where the beetle hails from, but is not yet available here to my knowledge. I am adding this to my list of thing to worry about, which is almost as long as my list of garden chores and the one of plants I still want to try someday.
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Welcome! I’m Margaret Roach, a leading garden writer for 25 years—at ‘Martha Stewart Living,’ ‘Newsday,’ and in three books. I host a public-radio podcast; I also lecture, plus hold tours at my 2.3-acre Hudson Valley (NY) Zone 5B garden, and always say no to chemicals and yes to great plants.