Florida Agricultural Experiment Station


 Control: This blight can be controlled by the application of
Bordeaux mixture or copper-lime dust.
 WHITE OR ALBINO CUCUMBERS
 The occurrence of white or albino cucumber fruits has been
reported during the past season with considerable regularity.
They can be found in almost every field visited. The percent of
such fruits is always too small to be considered of any economic
importance. These fruits are never packed and shipped because
they do not sell as well as the green fruit. Most growers cut
such plants at the soil line when found in the field. They can be
distinguished somewhat before any fruit develops because of
their lighter green color and general appearance. Few growers
recognize them, however, before the fruit sets and often such
plants are not killed until picking time. Other than as just
mentioned the plants appear and develop quite normally. -This
condition is not contagious in any way and there is no remedy
for it. Since the yellow-white fruits are not marketable, the
product of these plants is a total loss to the grower and were the
percentage of their occurrence large, it would be necessary to
recognize certain losses. These white fruited plants have been
found in several different varieties and it appears to be connected
with the white spine strain.
 Control: There is no artificial control for this condition other
than the destruction of these plants. It is a constitutional trouble,
probably a reversion to some impurity in the seed stock or to white
spine parentage.
 None of the generally practiced control methods such as sanita-
tion, rotation or application of fungicides can possibly change the
situation. However, care should be exercised in the selection of
seed in an attempt to avoid the trouble as much as possible.
 RING SPOT
 Ring spot of cucumber has been found only on the leaves. Only
 circumstantial evidence is at hand in attributing this trouble to
 physiological causes. Close observations have been continuously
 made during the growing season on cucumber fields in the vicinity
 of Gainesville. A specific inspection trip revealed the fact that
 all fields visited on that date showed leaves spotted as in Fig. 30.
 None was previously found and none has been observed since.
 The young leaves at the extreme tips of the runners were not
 spotted. The first spots showed on leaves about three-fourths
 developed and included all leaves older than these. Closer ex-