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BUNCH ROTS

BOTRYOSPHAERIA More severe in New Zealand than Australia. Bunch symptoms are difficult to distinguish from Phomopsis. Botryosphaeria does not have the can and leaf symptoms typical of Phomopsis. RHIZOPUS, ASPERGILLUS, PENICILLIUM AND ALTERNARIA Produce blue, green or black fungal growth on berries. Vinegar flies are often associated with these rots and help to spread them.

Rhizopus is distinctive, with black spores on long whiskers
Rhizopus is distinctive, with black spores on long whiskers
Photo credit: Bob Emmett
Look For Look For Notes

   LOOK FOR


    Look for in bunches
  • Shrivelled berries that become sticky and show black spore-bearing structures on the surface

OTHER BUNCH ROTS IMAGES

Secondary fungi and yeasts (sour rot) also rot bunches Ooze from sour rot Aspergillus rot occurs after wet weather, often in association with Rhizopus. Both produce black mouldy growth Berries with Botryosphaeria rot are shrivelled and covered with small, black spore-bearing structures Penicillium mould develops in ripe berries

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