G. album is widespread in the UK, France, Germany, Eire and other parts of Europe and also Australia, New Zealand, Canada G. perennans widespread in UK, Eire and other parts of Europe, Australia, New Zealand, USA and Canada Colletotrichum spp. ( …
Fruit rots Symptoms caused by the three fungal species on fruit are similar and symptoms are similar on all cultivars. The fungus usually enters via a lenticel producing a cheek rot, but it may also occur around the stalk or calyx where it enters via a …
Gloeosporium and Colletotrichum rots can be easily confused with those caused by Nectria galligena which also occur in the cheek, eye and stalk end of the apple. The presence of slimy spore masses usually distinguishes it from Nectria rot, but where these …
All three fungi overwinter in the orchard on cankers (G. perennans), dead twigs, diseased bark, dead leaves or mummified fruit. Cankers result from fungal spores invading wounds, frost cracks, etc, in trees. During wet weather in the growing seasons …
Gloeosporium and Colletotrichum rots are difficult to monitor in the orchard, since the rots are rarely seen, the cankers not easily distinguishable from those caused by Nectria and the fungi not readily distinguishable on other inoculum sources such as …
Remove possible source of inoculum, such as cankers, die-back, pruning snags, mummified fruits during winter pruning. Remove from the orchard and burn or macerate up in the alleyway to encourage rotting. Summer prune at the correct time to avoid die-back …
Research has shown that dipping the fruit in water heated to 48-50ºC for three minutes is sufficient to control Gloeosporium and Colletotrichum rot. However, such treatment is unlikely to be suitable for Cox since the margin between the temperature for …
Biological control of Gloeosporium and Colletotrichum rots on tropical fruit has been well researched. In Germany trials have shown that a commercial product Boni-Protect, based on the yeast Aureobasidium pullulans , gave comaparable control of …
Pre-harvest sprays Orchards with a history of Gloeosporium or Colletotrichum rot should be sprayed pre-harvest with sprays of captan or Switch (cyprodinil + fludioxonil) or Bellis (pyraclostrobin + boscalid) in July and August. Captan or Switch …
Mouldy core (Various fungi including Alternaria, Cladosporium, Epicoccum, Fusarium, Stemphylium) Mouldy core is an internal dry rot of certain apple cultivars, especially Cameo and Bramley’s Seedling. The main problem with mouldy core is that it develops …
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