Good morning, I am new to this forum, and need some advice. The attached is one of several leaves on a potted geranium. I have searched every leaf on the plant and can find no obvious culprits. This is one of four pots with similar plants, but none of the other pots have been attacked. As far as I can see, there are no caterpillar droppings on any of the leaves. I am hoping someone could advise on what to do. Many thanks