Ted here, visit the website below. Columbia Gorge Organic has been using compost tea for disease control of scab, fireblight and other foliar diseases. Several years ago I visited the Hood River Experiment station and observed many trees dying from fireblight. Some of he Stewart orchards (Columbia Gorge Organics) are located within one mile of the experiment station. When Ron Stewart was asked if he had fireblight problems he said, "No." When asked asked if he sprayed for fireblight he said he did not spray because he had no problem. Then said he did spray compost tea on his trees every two weeks and thought that that is why he had no fireblight problem. He worked with Soilfoodweb, Dr Elaine Ingham. Visit their web site; she is the Compost tea guru.
Columbia Gorge orchards stared with a 45-50% scab problem, it was reduced to <1%, thought to be due to compost tea.
Also visit Columbia Gorge web site listed below.
Compost tea will control fireblight, IF the compost contains the "right" blend of microorganisms. See Soilfoodweb site for detailed information.