I have a few Pings, none of them can catch fruit flies, but Drosera work well. I have a fruit fly problem too, year round, and the thing that works best for me a is to take an almost empty bottle of beer with just a centimeter or two left in the bottom, then affix a paper funnel with a hole just large enough for them to fit through down into the bottle, and then wait. The fermentation process that the beer goes through and the the carbon dioxide in the beer that drives fruit flies wild.do they work for fruit flies? I need a serious fruit fly trap, and soon. I was thinking about a Drosera or Pinguicula.