Genetic diversity in the coconut lethal yellowing disease phytoplasmas of East Africa

africa africa oriental afrique afrique occidentale afrique orientale bacteria coco coconuts cocos nucifera east africa enfermedades de las plantas genetic variation ghana kenia kenya maladie des plantes micoplasmosis molecular genetics mozambique mycoplasmose mycoplasmoses noix de coco pathogens pcr phytoplasmas plant diseases polymerase chain reaction tanzania tanzanie west africa