I have a live oak it has been alive and growing in Maryland since my mother planted it in 2000. last year I noticed it had some branches that did not get leaves. I though it was because of the cold winter. It's not gotten any new leaves yet this year and the old one still on it are looking bad. I though there might bad a parasite or fungal infection...I saw some webbing but your mite pages says they attack evergreens could this be the problem?