-5- 
Applied four times in 1940, nicotine sulfate (l:250), nicotine 
sulfate (1:500) with 1 percent of summer-oil emulsion, an d wettable 
derris spray (4 lb. per 100 gal.) with a resin adhesive reduced the 
infestation by 74, 77, and 35 percent, respectively. Applied four 
times in 1941, dusts of rotenone and talc and sprays of nicotine sul- 
fate reduced the number of larvae by at least 79 percent. The most 
effective treatments in 1942 were a dust containing 0,75 percent of 
rotenone and "copper oxychloride sulfate", and sprays of nicotine 
sulfate (1:250) and of white-oil emulsion containing nicotine sulfate 
(1:500). Dusts containing 0.75 percent of rotenone in talc or 20 
percent of cryolite with 5 percent of metallio copper were moderately 
effective. In 1943 a dust containing 0.75 percent of rotenone and 
"copper oxychloride sulfate" was effective.-- Whitcomb ( 676 , p.57; 
677 , p. 62j 678 , 681 , p. 35). 
In tests conducted from 1937 to 1941 in New York, satisfactory 
commercial control was given by a 1-percent rotenone dust, and by a 
spray of 2 quarts of nicotine sulfate or 4 lb. of powdered derris 
(5 percent of rotenone) in 100 gal. of water. TThen the proportion 
of derris was reduced to 1 or 0.5 pound, there were marked reductions 
in control. Commercial rotenone extracts in sprays were of little 
value.— Hervey (279 ). 
Of the rotenone sprays, only those containing 4 lb. of derris 
powder in 100 gal. of water gave commercial control. Sprays contain- 
ing nicotine sulfate (1:400) were about as effective as the best 
rotenone sprays. Dusts containing 1 percent of rotenone also gave 
very good control. — Parrott ( 457 ) . 
Dust mixtures containing derris or cube were recommended for 
the control of this insect in 1941. — United States Bureau of Ento- 
mology and Plant Quarantine (621 ) . 
Arctiidae 
( *pantesis ) Callorctia phyllira ( Drury) 
All rotenone insecticides tried in Alabama were ineffective.— 
Arant (22, 26). 
Diacrisia purpurata (L.) 
A cube dust containing 6 percent of rotenone appeared to be in- 
effective against this pest on lavender in Basses-Alpes, Franoe. — 
Pussard (478) • 
