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Rhizopus Rot of Peach
This post-harvest disease consists of large masses of black-grey fungus
extending outward from the fruit in a whisker-like effect. One diseased peach
in a container can infect many other fruits in a few days. Because this fungus
is a wound parasite, breaks in the skin favour disease development.
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Rhizopus rot on peach
Photo courtesy Agriculture & Agri-Food Canada |
Cultural Control
- Avoid bruising and skin puncture when picking and transporting fruit.
- Keep fruit cool after harvest.
Chemical Control
- Preharvest spray with iprodione 1 day before harvest helps to reduce Rhizopus
rot.
- Allisan (dichloran) is registered for use as a fruit dip by packinghouses.
Treated fruit should be placed in a cool room. The use of chlorine in
hydrocooling water followed by an Allisan (dichloran) fruit dip is even more
effective.
- For roadside stand sales, place excess fruit in cold storage. Rhizopus Rot can
be managed by dipping peaches immediately after harvest in Allisan (dichloran).
Continuous agitation of the bottom of the tank is essential. Peaches treated
with Allisan should not be left in direct sunlight or some skin shrivel may
occur.
February 2004
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