26 
plant, with nozzles distributed vertically instead of horizontally. 
Actual tield tests have proven that with this kind of an adjustment the 
main stalk, all the side branches, the small stems, and the squares can 
be thoroughly covered with the poisoned molasses solution. This 
spreads an inviting feast before the weevil wherever it travels about 
on the plant. Its fondness for sweets induces it to eat and its death 
is the result. . 
SPRAYING MACHINES. 
The kind of apparatus to use will depend largely upon the acreage 
to be treated and the season of year when the spraying is to be done. 
(1) Knapsack sprayers for trap rows and small acreages.—For the 
farmer having 10 to 20 acres of cotton there is no more practical appa- 
ratus than the knapsack sprayer. It holds about 3 gallons, and is pro- 
vided with leather straps which fit over the shoulder. When filled, . 
the workman takes the machine on his back. The pumping is done 
with one hand while the nozzle is held to the plant with the other. 
The operator should have an extension cane with an elbow for the 
nozzle. This will enable him to direct the spray most successfully to 
all the inner portions of the plants. 
Spraying with a knapsack machine is especially advisable in treating 
the trap rows. With the nozzle at the end of the extension cane, the 
spray can be forciblydirected into the whorl or leaf buds in the top 
of small plants. With this apparatus the spraying is done more per- 
fectly on very young cotton than is possible with the larger machines. 
When the plants become larger the knapsack becomes impracticable. 
Ordinarily a good active workman can spray 10 or 15 acres a day when 
cotton is small, and proportionately less as it grows larger. For those 
having their own labor and only a small acreage in cotton these 
sprayers are the most economical. 
(2) Aspinwall sprayers for large plantations—When hundreds or 
thousands of acres are to be sprayed, the knapsack, spraying 10 to 15 
acres per day per machine, is too slow a process. If enough machines 
were bought and a sufficient number of laborers employed to do the 
work, it would be done quickly and efficiently. This, however, would 
involve a considerable demand for labor at a time when laborers are 
scarce or are badly needed for other work. ‘To meet the conditions when 
large acreages are involved, a properly arranged boll-weevil attach- 
ment should be adjusted to the automatic sprayers. ‘These machines are 
drawn by horsepower and do the pumping and spraying automatically 
as the team pulls the machine along. The vertical nozzle arms are 
adjusted and the nozzle attached so as to spray into the cotton plant 
as already explained. Results of tests with these machines have 
exceeded expectations, for no part of the plant escaped being well 
covered with the poisoned solution. One hundred acres can be sprayed 
per day per machine when cotton is small. When it gets larger more 
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