Solutions are available for injured fig leaves. Fig trees in this area of the Northeast don’t have many pests. Once in a while, you’ll come across leaves being eaten or discolored. Sometimes you’ll find that nothing is eating the leaves or branches most probably because the sap (latex) is sticky and can be irritating (even to human skin). Other times, the problem might not be a pest, but a rust fungi infection.
One thing you can try is to stir up a mix of soapy water solutions and then spray it onto the leaves. You can use mild dish detergent. Dish detergent is generally a petroleum product, if this concerns you then use a biodegradable soap. You can find biodegradable soap solutions in camping stores and it’s much better for the environment. If it rains, reapply this soapy water. This is a common method of general plant care when it comes to pest control. Always resort to this method first before you consider other options. Another solution is to release ladybugs onto your tree and hope that they will eat the creatures that you can’t see.
There is a common pest called a Stink Bug. These bugs will lay a cluster of their eggs on fig tree leaves and the larvae will eat the leaves. If you have an infestation, solutions for this is to cut the effected leaves off of your tree and then burn them along with the larvae. Stink bugs are very difficult to eradicate and they were spreading throughout the Northeastern states 7 years ago. I haven’t seen any in my area since then.
These bugs were a problem in my neighborhood in 2010, but I haven’t seen any Stink Bugs for a long time. Maybe it was just a wave of a migration through the area or two of our very long cold winters eradicated them.