I am currently growing Summer Squash in a container, it has been doing very well. However, recently I noticed that some of the leaves are developing brown patches almost as if the leaves are losing their green and becoming see-through. there is also some spotting on a couple of leaves. Does anyone know what this may be? I have noticed some aphids i think but have gotten rid of them, could they have done this? First time grower here, thanks for he help in advance