Florida Agricultural Experiment Station


 Anthracnose:-This is the name given to the disease when
 it causes a spotting of the fruit. Anthracnose of grapefruit
 was first described in 1904 in Florida by Hume, who reported
 having first observed it in 1901. Later, Rolfs referred to the
 disease as being especially severe during the winters of 1901-02
 and 1910-11.
 The anthracnose blemishes vary from small specks to spots
 ranging from a quarter of an inch or more in diameter. At first,


















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Fig. 40.-Anthracnose blemish developed in thorn puncture on grapefruit.
 (1/4 natural size.)

these spots are reddish-brown in color but, when ful'y developed,
they become dark brown to black, circular or nearly so, sunken
below the general level of the surface, dry and hard (Fig. 39),
and occasionally dotted with minute, black fruiting bodies of the
fungus. Ordinarily, only the rind is affected but, in the course
of time, the disease commonly extends through the rind into
the pulp beneath, imparting to the fruit a disagreeable, and
often bitter flavor. These spots, however, may serve as points