Bulletin 229, Diseases of Citrus in Florida


grow luxuriantly on sparse-foliaged trees, where they can get
a certain amount of sunlight, they usually can be kept in check
by stimulating the trees to better development.


Fig. 100.-Growth of Spanish moss on orange tree.
 SPRAY PROGRAM


 A citrus spray program can serve only as a general guide for
average conditions. The grower should bear in mind that the
activities of trees are advanced or retarded from year to year
by growing conditions and crop production. As a result, there
is considerable variation in the time when trees begin to grow in
the spring, when they bloom and when the leaves and fruit reach
a certain size and develop beyond the point when they are sus-
ceptible to attacks of certain fungous diseases and insects. Trees
are also later in starting growth in northern districts than in