“Dear Jerry, my cocoa plants are infected with black pod disease. They are cropping OK, but can I do anything to improve their health?”, asks Peter in Townsville, Australia.
Hi Peter, Phytophthora is primarily a root rot disease and it can spread throughout a plant using the vascular system. Some plants are more susceptible than others and there may be multiple host plant species in your garden.
Certain types of Phytophthora can devastate entire landscapes (like Jarrah dieback, P. cinnamomi) and ruin orchards. This disease is recognised by conservationists as a key threatening process, it cannot be eradicated so you manage it.