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T he "Alabama polytechnic Institute, Agricultural Experiment Station 
(10) in 1935 issued information on the use of derris in controlling garden 
insects. Derris-sulfur dust (at least 1.0 percent rotencne) gave fair re- 
sults in controlling pickleworms and melon roras in squash, cucumbers, and 
cantaloups. As a spray, 4 pounds of derris (4 percent rotenone) should be 
used per 100 gallons. Directions are given for applying derris dust to 
squash, cucumbers, and cantaloups (15 to 25 pounds per acre per applica- 
tion. 
Ytfhite ( 460 ) in 1935 recommended derris-sulfur dust (l to 1.5 percent 
rotenone) for combating the pickleworm and the melon worm. In 1936 and 
again in 1937 he (482) wrote that the indications are that the melon worm 
and the pickleworm may be controlled satisfactorily on squash in the coastal 
areas of North Carolina and South Carolina, and probably elsewhere, by dust- 
ing with a derris-sulfur mixture containing from 1,0 to 1.5 percent of rote- 
none. 
Haude in advertising literature published by John Powell and Co., New 
York, IL-Y,, in 1939 recommended to dust with cube or derris plus sulfur 
(rotenone 1.0 to 1.5 percent) at 15 to 25 pounds per acre. 
Hetties ( 291 ) in 1939 referred to results obtained by the Bureau of 
Entomology and Plant Quarantine, which reported promising control of these 
worms on late* squash with a derris-sulfur mixture. The mixture contained 
from 1,0 to 1.5 percent of rotenone. From 10 to 25 pounds per acre of the 
mixture were applied at 7-day intervals, beginning about 1 week after the 
plants came up and continuing as long as worms wore present, 
Arant (14) in 1940 reported that derris-talc dusts containing 1 per- 
cent of rotenone were effective in controlling the pickleworm and the 
melon worm on small field plots; the control in cantaloups ranged from 83 
■to 100 percent and in squash from 89 to 100 percont. -- derris dust con- 
taining 25 percent of sulfur was effective against the insects but caused 
such severe burning to cantaloup foliage that an average of one-third 
fewer edible fruits were produced than on tho untreated chocks; plants 
treated with derris-tale mixtures produced 10 times as many fruits as the 
checks. Dcrric mixtures containing 0,5 percent of rotenone were less effec- 
tive than dusts containing 1 percent of rotenone. Cube appeared to be in- 
ferior to timbe and derris. Heavy applications of dusts were made, approx- 
imately 15 to 30 pounds to the acre, and .no attempt was made to determine 
the minimum effective rate of application, 
Evergestis rimosalis (Guen. ), the cross-striped cabbage w 
The Division of Control Investigations, of the Bureau of Entomclo 
and Plant Quarantine, United States Department of Agriculture ( ■-• 4 ) in 
May 1938 reported results of tests xr -id cube on thi or IS- 
cabbage worm as follows: 
