 The sycamore gall mite Eriophyes macrorhynchus produces small red galls , similar to those of the nail gall mite Eriophyes tiliae , on leaves of sycamore and field maple , Acer campestris from April onwards . Another mite , Aceria pseudoplatani causes a ' sycamore felt gall ' on the underside of leaves of both sycamore and Norway maple ( Acer platanoides ) . The sycamore aphid Drepanosiphum platanoidis sucks sap from buds and foliage , producing large quantities of sticky honeydew that contaminate foliage , cars and garden furniture beneath . 
