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luted, and 100 and 92 percent in 4 days -when diluted with talc at 
the rates of 1:1 and 1:3, respectively. In infested rape fields, 
the percentage mortalities given by 2 applications were 81 and 80 • 5 
for undiluted Kumex, 88.5 and 92 for another derris dust, and 76 
and 66 for a dust of derris and nicotine. In laboratory and field 
test 8 of four synthetic stomach poisons, none were as effective as 
Kua ex .—Meyer (413) . 
Ostomidae 
Tenebroides mauritanicus (L.), the cadelle 
The larvae were the most efficient in penetrating packages of 
foodstuffs, but when the packages were impregnated with 3 percent of 
rotenone, pentration was prevented for 27 days.-- Essig and coworkers 
(169). 
"—" Scarabaeidae 
Phyllopertha horticola (L.) ( "Anoroala (P,)H. L.), a cockchafer 
The adults seriously injured the leaves and fruits in orchards 
in the Lower Elbe district, Germany. In laboratory tests, pyrethrum 
did not give satisfactory control but derris sprays were fully ef- 
fective. --Speyer (560) • 
Maorodaotylus subspinosus (F.), the rose chafer 
Peach trees in a Connecticut orchard, where the young fruits 
were being attacked by large numbers of this pest, were treated 
with sprays containing lead arsenate, or 10 pounds of cube powder 
with skijnmilk spreader in 100 gallons of water. A week later there 
were no adults on the 50 trees treated with lead arsenate, 8 on 22 
trees treated with cube, au I 70 on 50 unsprayed trees. In a pri- 
vate garden only partial control was given by 2 pounds of cube and 
1 pound of pyrethrum in 100 gallons of water.— Garman (219) . 
Popillia japonica Newn., the Japanese beetle 
One of the four most usefil sprays tested contained derris. — 
U. S. Bureau of Entomology and Plant Quarantine (615) . 
Derris is an effective repellent for this beetle.— Chisholm 
and Goodhue (113 ) • 
Tests of the protective value of seven sprays were made on 
apple and shade trees in Maryland in 1939. A spray consisting of 
10 pounds of derris (l percent of rotenone), 3 pounds of rosin 
