My neighbours all spray their olive trees with chemical insecticides but I have not used anything over the last 6 years. Insects always get into the fruit and the olives drop off the trees before their time. In previous years this hasn´t bothered me as only two of our ten or so trees have developed olives, however this year all of the trees have blossomed well and we´re hoping for a good crop. Any suggestions for spraying the trees as organically as possible. Also when and how often to spray them. thanks richard