It performed well in all trials with three to five welltimed applications. Starting at the high rate and finishing at the lower rate when fruit is formed, it did not cause fruit russeting. Kocide performed well in controlling scab infection on fruit and leaves and is very easy to work with. At 0.5 pounds per acre, it controlled scab without severe fruit russeting. It also could be combined with Stylet oil or Thiolux and used at a lower rate without fruit russeting and perhaps enhancing control.
Registration is pending in California.
COCS performed similar to Kocide in all experiments. Stylet Oil and Hytech Oil showed some efficacy in controlling apple scab. Stylet oil was more effective in combination with one of the fixed coppers. Both were somewhat difficult to work with since they were heavy liquids used at fairly high rates. MPede , an insecticidal soap, showed some ability to prevent scab infection, and was similar to the mineral oils.