Florida Agricultural Experiment Station


stages or degrees were observed from leaves showing only a few
spots to those almost completely killed and shrivelled. Fig. 30
shows one of the slightly affected leaves.
 The spots were generally circular in outline, although the lines
were somewhat irregular both as to density and contour. The
blade of the leaf was a normal green in color, while the margins
of the spots were decidedly yellow, grading into brown, apparent-
ly depending upon the intensity of the burning action. The tissue
in the interior of the circles was a normal green in color. Leaves
badly affected dried out rapidly in the following day or two and
became brown. The edges curled upward very much like leaves
affected with downy mildew.
 The picking season was past its height at this time so that little
or no damage was caused.

 SNAKEHEAD
 Occasionally cucumber seedlings are found that make no
growth or abnormal growth after the cotyledons appear above
ground. Closer examination shows the growing tip entirely
lacking or suffering from severe injury. The name "snakehead"


 Fig.-31. Snakehead of cucumber, probably the result of mechanical injury.
Normal plant on the left.