Florida Agricultural Experiment Station


TABLE II.-SPRAY PROGRAM FOR PRINCIPAL FLORIDA CITRUS DISEASES AND
 INSECTS, ARRANGED BY SUBJECTS.-Continued.


Time of Application


Summer application.

 In May.


 WHITEFLIES
 (and scale-insects)

 Materials Used Remarks


 Oil emulsion at theI Preferably when first
Rate of 6% quarts to flush of growth has hard-
100 gallons. ened and fruit is about an
 Sinch in diameter. May be
 omitted if summer applica-


 tion of oil emulsion is made
 I for the control of scale-
 I insects.

 During the rainy I Red Aschersonia or Spraying with cultures of
season. red whitefly-fungus. this entomogenous fungus
 has proved very effective in
 Controlling whiteflies and,
 under certain conditions,
 constitutes the most eco-
 nomical means of control.

Fall application. Oil emulsion at the I Preferably about 10 days
 rate of 6% quarts to after practically all the fall
 Preferably in late 100 gallons. brood of whiteflies have
September or early Iceased flying, so that most
October. of the eggs will have
 I hatched. May be omitted if
 Fall application of oil emul-
 sion is made for control of
 scale-insects, or if either
 Sthe red or the brown white-
 Sfly-fungus has become well
 established in the grove.
 RUST MITES AND RED SPIDERS


 Any time rust
mites or red spiders
become abundant.


 IDusting sulphur,
 liquid lime-sulphur
Ithe rate of 1 part
from 50 to 65 parts
Water.


 While rust mites are most
numerous in May and June,
they may become sufficient-
ly numerous to injure the
fruit at any time after it at-
tains a diameter of a half
inch. While dusting is usual-
ly most economical for rust
mite control, spraying gives
better control of red spi-
ders, especially during cool
weather. Rust mites are
held in check when applica-
tions of oil emulsion are
made, especially when dry
soda-sulphur is added at
the rate of 2 pounds to
100 gallons.