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Desmia funeral is (Hbn. ), the grape leaf folder 
Dickey and Loucks (98) in 1938 recommended derris spray for control 
in Florida. 
Diaphania hyalinata (L.), the melon worm 
_D. nitidalis (Stoll), the pickleworm 
Reid ( 345 ) in 1933 reported that in tests made in Charleston, S. C., 
derris dust, mixed with tobacco dust to give a 1,5 percent rotenone con- 
tent, is particularly effective against the melon worm and the pickleworm. 
In a series of plots in which derris, cryolite, pyrethrum, paris green, 
lead arsenate, and calcium arsenate were used, effective control was ob- 
tained in the order given. The derris plot produced 765.5 pounds of 
sound fruit, as compared with 86.5 pounds of sound fruit produced on the 
calcium arsenate plot. The derris plot produced over 100 pounds more of 
sound fruit than did the cryolite plot, which was next in effectiveness. 
The check plot produced no sound fruit. 
The United States Department of Agriculture, Bureau of Entomology and 
Plant Quarantine (435) in 1954 issued the following recommendations for 
the control of some important truck-crop insects: 
The indications are that the melon- and pickleworms may be satis- 
factorily controlled by dusting with a derris-powder mixture contain- 
ing from 0.5 to 1.5 percent of rotenone. In light infestations the 
0.5 percent dust should be sufficient if applied early and regularly. 
"Where the infestation is heavy the 1 percent or the 1.5 percent dusts 
should be used. Sulfur seems to be the most effective diluent for 
melon worms and pickleworms, possibly because of some action against 
young larvae. The addition of from 10 to 25 percent of talc, clay, 
or wheat flour or finely ground tobacco dust to the derris-sulfur 
mixture will improve its dusting qualities. 
The treatments should begin when the worms first appear on the 
leaf buds of the squash plant, which may be within a week or 10 days 
after the plants appear above ground, and should be continued at 7- 
to 10-day intervals as long as the worms are present or the crop is 
being harvested. The rate of application will depend on the size of 
the plants, and should' range from 15 to 25 pounds per acre. .Extreme 
care should be exercised to see that the growing tips of the plants 
are well covered with the dust as the worms feed extensively on the 
young leaf buds before tunneling into the fruit, stem, and vines. 
There are several leaf- feeding forms which may attack lettuce 
and spinach, and on occasions cause considerable damage. Pyrethrum 
or derris is recommended as a substitute for the arsenical s in order 
to safeguard the health of the consumer. 
