Figure 2.

(A) Tuber of potato cultivar Nadine showing potato tuber necrotic ringspot disease (sunken necrotic rings and lines) typical of infection with R2 recombinant necrogenic strains of potato virus Y. (B) Sweet potato plant with sweet potato disease showing severe plant stunting and leaf chlorosis symptoms on right, healthy plant on left (image credit @International Potato Center/Segundo Fuentes). (C) Banana plantation with banana bunchy top diseased plants showing severe stunting, and short narrow upright leaves bunched at their tops, tall healthy plants on left side (image credit @International Institute of Tropical Agriculture/Lava Kumar). (D). Plum orchard showing premature fruit drop caused by plum pox disease. (E) Diseased fruit on plum tree showing ‘pock marks’ caused by plum pox disease. (F) Diseased apricot fruit harvested from apricot orchard showing ‘pock marks’ and internal flesh browning caused by plum pox disease. (G) Diseased apricot fruits splitting before harvest on plum pox diseased tree.