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in Texas* The following is said concerning cube: "Cube, .another commercial 
rotenone- "bearing plant, is .approximately equivalent to derris in its rotenone 
content." 
Hervey, Kuckett, and Glasgow (191) in 1935 recommended a dust contain- 
ing 0.5 percent rotenone made "by diluting derris or cube with talc or clay, 
used at the rate of 30 pounds per acre for the control of the imported cab- 
bage worn, Pi oris rapae L. , the cabbage looper, Autographa brassicae Riley, 
and the larvae of the diamond- back moth, Plutella naculipcnnis Curtis. The 
Zebra caterpillar, Mamestra picta Harr. , is very resistant to derris dust. 
Instead of dust, derris spray at the rate of 100 gallons per acre nay be used. 
Thin is made by adding 4 lbs. derris powder (4$ rotenone) and 4 lbs. skin 
nil): powder to 100 gals, water. 
Hervey (190), in discussing the European corn borer, stated that spray- 
ing or dusting sweet corn nay becone feasible where* the value of the crop is 
high. Insecticides showing the host pronisc include derris or cube-, pheno- 
thiazinc, and nicotine. 
Foytaud (146) in 1935 mentioned rotenone powders for combating the 
Colorado pot ,to beetle in France. The typo formula is 5 parts powdered derris 
or cube (rotenone not less than bfo) and 95 parts talc or kaolin. 
The Colorado Agricultural Experiment Station (86) in 1935 reported 
that pyrcthrun- and rotenone-beoring materials are more effective on cabbage 
worms as dust than as sprays. Dusts of these materials that are effective 
against cabbage worms do not ^ive satisfactory control of plant lice. The in- 
ported cabbage worm is controlled with pyrcthrin- and. rotcnone-bearing dusts 
of lower strengths than will control the cabbage looper and diamond-back ncth. 
Calcium arsenate dusts gave very poor control of the imported cabbage worn, but 
po.ris green dust gave a satisfactory control. Derris and cube dusts were equaV 
ly effective when used, at the sane rotenone content, although the cube appear- 
ed somewhat more erratic when used, during cocl weather in the fall. 
Rotenone and pyrethrins are known to break down more rapidly in direct 
sunlight; however, there were no significant differences in the results from 
morning .and evening applications. 
The "New Jersey Agricultural Experiment Station (302) in 1935 reported 
that derris arid, cube roots are practically equal in their toxicity to aphids, 
provided, that they contain about the sane amounts of rotenone and total ex- 
tractives. 
Pcnton (145) in 1936 compiled information on the use of sulphur in the 
control of truck crop and. cane fruit insects and. diseases. Information is 
included on mixtures of sulphur with derris or cube. 
Boyce (37) in 1935 reported, finely powdered cube root ineffective 
against the citrus red nite, Paratetranychus citri McG. , and its eggs under 
field, conditions in California. 
