12 FARMERS’ BULLETIN 1735. 
a single leaf it is most important in spraying to Ait the entire under- 
side of every leaf of an infested plant. Careless spraying is certain to 
yield unsatisfactory results. 
SUMMARY OF REMEDIES. 
To prevent injury to cotton by red spiders the following steps 
should be taken: (1) Destruction of all weeds around the farm dur- 
-Fic. 10.—Ideal spraying outfit for treatment of considerable red-spider infestation. 
ing the winter and early spring; (2) spraying of cultivated plants 
around the dwellings; (3) maintaining a finely pulverized surface 
soil; (4) destruction of early infested plants or large areas of heavy 
infestation by plowing up and burning; and finally (5) spraying 
with potassium sulphid, lme-sulphur, kerosene emulsion, or a flour- 
paste solution if the infestation is more or less general. 
. 
WASHINGTON : GOVERNMENT PRINTING OFFICE : 1916 
