This is my first year of gardening since constructing my raised garden bed. My zucchini plant has been growing very well and producing several fruits. It has recently started to turn brown on the leaves. In reading on this forum I have seen some scary information about squash vine borers (SVB). When I went out to take a picture of the leaves, I happened to see what I think is a SVB based on internet pictures. Can someone confirm this, and also comment on whether this is what is causing my brown leaves? I have a drip system set on a timer, so the watering is consistent. Is there any turning back or is my zucchini done?