Hello, friends, So far as treatment for white fly is concerned, we have found malathion to be the only really effective treatment. Up until last year, we never had a problem with them; but twice during 2001, and again twice during 2002, we are so afflicted. Application has been made difficult by dewy leaves in the morning and the fact that we get home after dark, and also by the fact that we realtors work weekends (my wife cannot abide spraying, because of her asthma.) Ron Van Nuys, CA