Coneflowers Being Eaten - Knowledgebase Question

Syracuse, NY
Avatar for mmglick
Question by mmglick
July 16, 1998
Any ideas about what could be munching on the petals of my coneflowers, and what I can do to prevent further damage? I have noticed small, iridescent-bodied flies on the plants--could they be the culprits?

Answer from NGA
July 16, 1998
It sounds like Japanese beetles have found your coneflowers. If so, these beetles munch for about four to six weeks in July and August; infestations are heavier some years than others. Luckily, the damage doesn't usually kill the plants. Some gardeners simply tolerate the damage, some hand pick the beetles and drop them into soapy water. Another option is to try the pheromone traps, carefully following the instructions as to locating the traps so as not to inadvertently attact even more beetles to your garden. Finally, if it is really severe, you might try spraying neem on a regular basis according to the label instructions.

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