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Bourne and Boyd (36) in 1937 gave directions for the control of 
common insect pests in the home garden. Derris or cube dusts should 
contain 0.5 to 0.75 percent rotenone. For plant lice pyrethrum and 
rotenone sprays are also effective. For the control of the asparagus 
beetle, during the cutting season, leave occasional shoots uncut to 
attract the "beetles for feeding and egg laying, and keep the rest of the 
bed closely cut; or apply non-poisonous pyrethrum or rotenone sprays or 
dusts. For the control of the Mexican bean beetle, after pods have 
formed, spray or dust pyrethrum or rotenone compounds as recommended 
for each brand. For cabbage worms, when caterpillars first appear, 
apply a fresh pyrethrum dust mixture containing at least 30 percent 
pyrethrum or a rotenone mixture containing 0.5 to 0.75 percent rotenone, 
using about 30 pounds to the acre. Commercial pyrethrum or rotenone 
sprays or dusts may also be used. They should be diluted as recommended 
by the manufacturer. In cases of light or "spotty" infestations only 
the infested plants need to be treated. Usually it is advisable to 
treat the entire planting. For the striped cucumber beetle, when 
beetles first appear, dust plants with a rotenone mixture containing 
at least 0.5 percent rotenone. 
The Massachusetts Agricultural Experiment Station (272) in 1937 
reported that for the control of the squash vine borer the most effective 
insecticidal treatment was a spray prepared from cube powder at the rate 
of 5 pounds in 100 gallons of water, which was made wettable with fish-oil 
soap at the rate of 1 quart in 100 gallons of spray. This reduced the 
injury 74 percent. 
The United States Department of Commerce (439) in October 1937 
reported that the government of the Union of South Africa is conducting 
researches to discover a cheap, efficient locust killer less poisonous 
than sodium arsenite. Some preliminary investigations undertaken with 
powders containing rotenone and with liquid sprays have not yielded 
very favorable results, but further investigations will be made, 
expecially with powders containing rotenone from derris and cube for 
use in baits. 
Bronson (53) in 1937 described an improved apparatus for mixing 
derris or cube powder with a diluent and a conditioner. 
A dust containing 1 percent of rotenone for use against the pea 
aphid is made by mixing derris or cube root powder (containing 4 percent 
of rotenone), 15 pounds; talc (or other suitable diluent), 43.2 pounds; 
conditioner (wetter and spreading agent), 0.6 pound; water, 1.2 pounds. 
Satisfactory conditioners are sodium oleyl sulphate and an alkylphenyl- 
benzenesulphonic acid. 
The derris or cube root powder should be of such a degree of 
fineness that not less than 90 percent of it will pass through a sieve 
having 200 meshes per linear inch and all of the material (100 percent) 
should pa.ss through a sieve having 80 meshes per linear inch. The talc 
or other suitable diluent used should be of such a degree of fineness 
that all of the material will pass through a sieve having 300 meshes 
per linear inch. 
