Hello All,

Please advise what is the white stuff on my lemon tree. It is spreading to my tangerine tree right next to it. I live in Southern California (zone 9).

The trees have direct sun light all day. I did some internet searches and some said it is white fly eggs, mold or mildew. I have already cut many infected branches down. I came to realized there hardly any lemons this year. Thank you and appreciate all inputs.