Florida Agricultural Experiment Station


growths. In severe cases of attack, as on the sour and bitter-
sweet orange trees, the twigs may be killed.
 On the Fruit:-The disease starts on the fruit in much the
same way as on the leaves and twigs, forming irregular scabby
spots or caked masses which vary from cream-colored to pale
yellow in young fruits to drab or dark olive-gray with age. This
change in color is accentuated by saprophytic fungi growing on
the surface of the scabby tissue. Fruits severely attacked
when very young often become misshapen, with prominent warty


 Fig. 9.-Scab on Temple orange, showing warty projections.
projections or conical growths extending from the surface (Fig.
9). On grapefruit, the infected areas tend to flatten out and the
fruit which reaches maturity may show merely large scabby
patches of considerable extent, the entire surface being covered
in severe cases (Fig. 10). Severely attacked fruit may drop
prematurely. Although the scab infections are superficial and
do not affect the interior of the fruit, the fruit when badly in-
fected is unfit for market, while slight attacks lower the grade.