Sunblotch (avocado sunblotch viroid): Twigs have a
light yellow, sunken streak that follow the lenght of the twig. Fruits have
white or yellow areas. Trees are stunted and have a sprawling growth habit.
The pathogen is transmitted in budwood, graftwood, or seed from infected trees.
Disease-free nursery stock should be used and trees with symptoms should be
removed from the orchard.