STUBBORN

STUBBORN

One grower mentioned a disease producing acorn-shaped sweet orange fruits with tht rind at the navel end being particularly thin. Twigs were described as being "shaky.' and the growth of the tops so reduced thin: the grower had the trees (6 out of 2,000) removed. This would suggest the preset of stubborn disease. At times, trees were seen that bare some of the early stage symptoms described for stubborn, such as imbricated foliage, rounded and cupped leaves, and poor fruiting, but single ob­servations are not considered adequate to implicate the existence of stubborn virus.