101 Ideas: Talk about gall! Abnormal growths that appear on the surface of leaves (or stems) are usually a sign that an insect is at work. There are hundreds of gall types, caused by mites, midges, tiny wasps, aphid-like insects and thrips and they vary in shape -- from red and spindly to round and green to large and woody -- depending on the type of insect and the plant affected.
June 10, 2013 - Greece Post