I have mums that I've had for years in the same spot, under a tall evergreen tree that is trimmed WAY up. They get mostly morning sun and a little sun late in the day, and the tree shelters them from light rains. They have always come up in the spring, filled out, and bloomed in the fall. They look bad this year, spotty, thinner, sometimes curling up. As I was cropping pictures I took to send to you, I found two or maybe three insects that could be the culprits. Does this look like disease, insects, or just drying out and old age? What are your suggestions?  (The first picture seems to have a long thinnish green insect, and the second picture has a yellow and black striped beetle-type.)