Holes in Flower Leafs - Knowledgebase Question

Corona, Ca
Question by genedickey
March 11, 2010
Many large holes are appearing in the leaves of our hibiscus, geraniums, gerbera daisies, and hydrangeas. The only

Answer from NGA
March 11, 2010


Probably caterpillars of some sort. They hide on the undersides of leaves and are sometimes hard to see - but their damage is quite evident. Look also for frass (bug poop) on the upper sides of the leaves. If you see small black pellets, caterpillars are feasting on the plants. The botanical Bt (sold as Dipel or Thuricide) will control them.

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