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Eradication Of Apple Scab, John Cripps, Ralph Doepel
Eradication Of Apple Scab, John Cripps, Ralph Doepel
Journal of the Department of Agriculture, Western Australia, Series 4
The detection of apple scab in two orchards at Pemberton and New/ands in December 1989 ended Western Australia's 41-year, scab-free span for apple growers .
Without eradication orchardists would have had to apply up to 20 fungicidal sprays a year, at an annual cost of $1-2 million, to be able to market a high proportion of scab-free fruit. The industry chose eradication as the cheaper alternative, but the location of infected orchards at Pemberton in particular, with its high rainfall, suggested that it would be difficult .
Scab, or black spot, is the most serious fungal disease of apples in …