What's happening to my Ridge Gourd?
I am a newbie gardener and started with few tomato plants, ridge gourd and some leafy vegetables. Tomatoes, leafy vegetables are good but having few problems with the ridge gourd. I have few ridge gourd plants very near to each other and they are inter-twined already so its kind of hard for me to isolate if the problem is only for a specific plant or to all of them. The problem is some ridge gourds are going bad (dis colorization and falling off) but others are fine. The ones that are going bad are as small as less than a inch to as big as more than 3 inches. I am attaching some photos of both the good ones and the bad ones. Anyone have a clue on what's going on. By the way, I am in northern california and the soil type is clay. Thanks in advance.