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Bagworm larvae, not more than two-thirds grown, were, controlled, 
apparently "by repellent action, by derris or cube powder in water. to which 
rosin-residue emulsion had been added. — New Jersey Agricultural Experi- 
ment Station (294) in 1938. 
Pterophoridae 
Pterophorus periscelidactylus Fitch, the grape plume moth 
( Oxyptilus ) Pterophorus periscelidact ylus readily controlled by spray- 
ing with 3 pounds of ground derris or cube (4 percent rotenone) and 1 pound 
of pov/dered skim-milk in 100 gallons of water. — Haude, in advertising 
literature published by John Powell and Co., New York, N, Y., in 1939. 
Pyralididae 
Acrobasis caryae C-rote, the pecan nut casebearer 
Moznette ( 285 ) in 1935 reported that sprays containing pyrethrum and 
derris extracts produced very unsatisfactory results against this species 
in the Southeast in 1932 and 1933. 
Homalopalpia dalera Dyar 
IVolfe and Lynch ( 497 ) in 1940 reported that spraying for control of 
the papaya webworm is difficult because the web soon fills with excreta. 
A strong pyrethrum spray, or a rotenone spray, gives fair control if 
applied with enough pressure to drive away the web. The webbing may bo 
removed with a feather to give the spray free access to the stem and fruit. 
Pyraustidae 
Crocidolomia binotalis Zell. 
Van der Vecht ( 454 ) in 1936 reported tests of derris against this 
species, which is a serious pest of cabbago in Java. Tests in the field 
with derris dusts containing 0,5 percent and 1,0 percent of rotenono ^avo 
excellent results. Tho dust was applied onco a Week from a small tin, 
closed with a piece of cheesecloth, or by means of a hand 'duster. The 
dusted plots yielded about three times as much as tho untrcatod plots and 
twice as much as a plot where tho caterpillars had been regularly destroyed 
by hand-picking. About 5 to G pounds of dust arc required for 100 cabba 
during the entire growth period, but whore infestation is loss severe, tho 
number of applications may perhaps be reduced. Spraying with derris powdor 
in water (rotenone 1: 2,860 to 1:10, 000) was less satisfactory than dusting. 
Merino and Otanes ( 273 ) in 1938 recommended derris powder for the con- 
trol of these cabbage caterpillars in the Philippines. 
