Dear garden experts, I own my home for two years. A bush started to show illness symptom since this spring: All leafs became yellow and the branches were rotten. Although I trimmed the bad part, I can not get it back to normal. Eventually, I have to pull it off from my garden and I found that there are some green balls of diameter 1/8" attached to its root and the surrounding area. When I smashed it, it looks like a shell with liquid inside. This makes me really concerned as two same plants also have similar, but milder symptom. I did not apply fertilizers to my bushes at all. However, I am not sure if the previous home owner did apply fertilizers or not. Can you please help me identify what my bush is and let me know if the green balls are some kind of bug eggs or not. If they are not bug eggs, can you please share with me what might be the cause of the death of my bush as well as the steps to prevent the spread of the disease? For your information, I attach three photos of my bush. Thank you very much for your help.