e in separate permanent stock solutions, as shown in
Fig. 42, containing 2 pounds to the gallon of their respective
ingredients. These will keep indefinitely, if the water evaporated is
replaced, and may be used from as needed.

_Spraying apparatus._--Tomato growers having only a small area to spray
may use one of the numerous forms of hand-pumps or bucket sprayers now
on the market. For larger fields it will be necessary to employ a
barrel sprayer. This consists of a hand-pump mounted in a barrel or tank
and equipped with two leads of 3/8 inch hose 25 feet long, each with a
four-foot, extension made from 1/4 inch gas pipe, and a double Vermorel
nozzle. The barrel should be carried in an ordinary farm wagon. Three
men do the work. One is expected to drive and pump, while the other two
manipulate the nozzles. The outfit is stopped while the plants within
reach are sprayed, then driven forward about 30 feet and stopped again.
On an average in actual field practice 3 to 4 acres a day can be sprayed
in this way, applying 100 to 200 gallons of Bordeaux per acre. To keep
the long hose off the plants two poles about 10 feet long may be pivoted
to the bed of the wagon so as to swing at an angle over the wheel and
carry the hose. The pump for this outfit should be of good capacity,
with brass valves. A "Y" shut-off discharge connection on the pump is a
convenience for stopping the spray at any time. The most satisfactory
nozzles are those of the Vermorel type. It is cheapest in the long run
to buy the best grades of pumps on the market. This outfit is
excellently adapted for spraying small fields of potatoes and for
general orchard work, and is invaluable on the average farm.

=Phytoptosis.=--This disease is known to occur only in Florida, where it
is sometimes common enough to require remedial treatment. The affected
portions of the foliage are more or less distorted and covered with an
ashy white fuzz. The general vigor and fruitfulness of the plants are
greatly reduced. The name applied to this trouble denotes its cause, an
extremely small mite (_Phytoptus calacladophora_ Nal.), which by its
presence on the leaves or stems so irritates them as to result in the
abundant development of modified plant hairs, which shelter the mites
and form the fuzzy covering characteristic of the disease. A remedy for
phytoptosis is available in the sulphur compounds. The following one is
particularly recommended by Prof. P. H. Rolfs, to whom o