Multiformulation dips for controlling storage disorders of apples and pears. I. Assessing fungicides

Abstract

When applied as post-harvest dips on ‘Granny Smith’ or ‘Jonathan’ apples and ‘Packham Triumph’ pears, the fungitoxic effect of Benlate, Rovral, Dithane M45 or Imazalil was not adversely affected by the presence of diphenylamine or calcium chloride. Best protection from storage rots was obtained with Rovral and Imazalil on ‘Granny Smith’; Benlate, Rovral and Imazalil on ‘Jonathan’ and Rovral or a Dithane M45 Benlate mix on ‘Packham’ pears. Calcium chloride in these dips reduced ‘Jonathan’ breakdown and when mixed with Benlate, Rovral or Imazalil, it improved retention of fruit firmness. A disadvantage of calcium chloride in dips was its effect of increasing skin injury (lenticel spot) on ‘Granny Smith’ and ‘Jonathan’. Scald control by diphenylamine was unaffected by the presence of calcium chloride or fungicides. © 1980, All rights reserved.