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Rhizopus fruit rot of jackfruit

Male flowers and young fruits turn soft and brown, get covered with grey black fuzzy mold, and then drop.

Rhizopus artocarpi (Rhizopus stolonifer) Fungus Fact sheet
Rhizopus mold (Rhizopus stolonifer), the fuzzy gray mold that also rots jackfruit, on a ripe fruit
Photo: S.R, CC BY, via iNaturalist

Crops it strikes

What you see

RottingPowdery or fuzzy growth

When to act

In the rains, check the male flower spikes and young fruit every week. Pick off any that turn soft and brown or carry grey black fuzz, and gather the ones on the ground.

Before you spray

Sprays are seldom needed. Pick off sick flowers and fruit, prune for air, and handle the fruit gently.

How to prevent it

  • Prune the trees open so wind dries the young fruit quickly after rain.
  • Remove rotting male spikes and young fruit from the tree and the ground, and bury them away from the trees.
  • Harvest and carry fruit with care. Bruises and cuts let the mold in.
  • Store fruit in a cool, airy place, and pull out a rotting fruit at once before it spreads to the rest.
  • Keep packing sheds, crates and bins clean of old fruit and plant trash.

Where this comes from

Not sure it is this one?

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