What are these roundish flat disc type things on my squash? Is it an egg of some sort? I was culling leaves showing signs of powdery mildew and noticed these on the backs of them. Can anyone tell me what it is so I can treat for it? Thank you! Currently it’s all being watered by rain water because it will not.stop.raining. But I have drip irrigation set up for when it’s needed. It’s in full sun and gets late afternoon shade from the forest. Originally by u/Gardeningcrones on Reddit: https://tinyurl.com/28trggno