Control of stem-rot in oranges after harvest

Abstract

Borax-boric acid, sodium o-phenylphenate, diphenyl, sodium salicylanilide, and 2,4-dichlorophenoxyacetic acid (2,4-D) were compared for their effects on stem-end rot (Diaporthe citri (Faw.) Wolf) when applied to harvested oranges. Sodium salicylanilide gave consistent reductions of wastage and was the most promising of the chemicals tested for oranges marketed locally, where protection is required for three to four weeks after harvest. Wraps and box liners impregnated with diphenyl also reduced stem-end rotting and are useful where a longer period of protection is required, as in fruit which is exported.