Florida Agricultural Experiment Station


contains the oil cells and pigment (Fig. 73). Such abnormal
fruits will split very readily when subjected to a slight pressure.
Owing to their weak structure, creased fruits are quite likely


 Fig. 73.-Creasing on Pineapple orange.

to be attacked by the blue and green mold fungi in transit and
are culled out in grading.
 The cause of creasing is not understood but it has been ob-
served that the trouble occurs most frequently on very mature
fruit. However, it occurs at times on fruit that has not attained
the point of overmaturity. This trouble appears to occur most
commonly on the thin-skinned fruit produced in the low ham-
mock groves. In view of our present lack of knowledge of the
exact cause of creasing, no control measures can be suggested
other than to pick the fruit earlier in those groves where the
trouble is likely to occur.
 LUMPY RIND
 Lumpy rind is a characteristic abnormal condition of the rind
that occurs occasionally on grapefruit, and rarely on oranges.