Citrus diseases are a significant threat to our citrus trees in California and all citrus growing regions. I have made a video showing 14 of the nastiest ones and giving tips for avoiding them. Citrus tree diseases of great concern include Huanglongbing (HLB) or citrus greening, citrus tristeza virus, citrus stubborn disease, cachexia, exocortis, psorosis, citrus variegated chlorosis, citrus tatter leaf virus, leprosis, citrus leaf blotch virus, canker, sudden death, black spot, and chlorotic dwarf. The video also shows some of the insects and mites that spread diseases. These include Asian citrus psyllids, cotton aphids, brown citrus aphids, leafhopper insects, sharpshooter insects, and flat mites. The video includes citrus disease pictures and citrus pest pictures.
Below you will find the resources mentioned in the video.