for a perfect fruit on apples, I treat 8 times. early april i use copper. then in mid april i spray nova, dithane DF, Astro and a sticker.That is my fruit tree mix, but you can buy a fruit tree mix at the store/then in early May i spray again and again in mid May 14 days later.then again in early June 14 days again.then i wait 30 days and treat again in July,without the Dithane,then again in August 30 days later without the Dithane, then in September is spray horticultural oil or soap, 30 days after the august treatment . always thin your fruit and rake up any fallen fruit. john