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Does coffee aroma have a detering effect on some insects, like flies, mosquitos etc.?

Are there any researches on how the 'house' insects are reacting on coffee aroma?

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    Coffee grounds can be used to attract cockroaches as a trap: see related: http://coffee.stackexchange.com/questions/183/use-for-old-grounds where it is listed as a potential use for used grounds – EdChum Feb 06 '15 at 09:13

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Though I can't find any recent evidence, it seems that research at one time shows that caffeine can be used as an insecticide. However, due to the fact that natural light exposure degrades caffeine, it probably wouldn't make for a very good long-term solution.

Kyle Macey
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