Photo 1. Black pod infection, Phytophthora palmivora, on the lowest pod on the trunk. It is likely that rain has splashed soil containing spores onto the pod where they germinate and infect.
Photo 2. The water mould, Phytophthora palmivora, infects the young leaves, especially along the veins.
Photo 3. The water mould, Phytophthora palmivora, has infected the pod and then grown from the pod into the branch. The light brown margin of the red area is where the water mould is still active. The red colour is caused by fungi.
Photo 5. Oecophylla ants tending colonies of insects feeding on cocoa pods. It is possible that ants carry spores of Phytophthora palmivora from infected to healthy pods.
Phytophthora palmivora. It is not a fungus, but an oomycete or a water mould, related to algae.
AUTHORS Helen Tsatsia & Grahame Jackson
Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.
This mini fact sheet is a part of the app Pacific Pests and Pathogens
The mobile application is available from the Google Play Store and Apple iTunes.