-.159- 
Haude in advertising literature published "by John Powell and Co., 
New York, IT. Y. , in 1939 stated that this insect nay "be controlled with a 
0.75-percent dust or a liquid-rotenone spray. 
Harris ina brill ians B. and McD., the ivestera grape skeletonizer 
Finch et al . (133) in 1939 recommended derris preparations for the 
control of the ■western grape skeletonizer. 
Illiberis pruni Dyar 
The Institute of Physical and Chemical Research ( 214 ) Tokyo, Japan, 
in 1927 reported that Neoton, 1 pound in 60 imperial gallons of -water, 
$ra.rded off an attack of the larvae for 5 days, and that in a field sprayed 
with Neoton 25 percent of the larvae were killed by the internal action of 
the drug. A pound of ITeoton in 32 imperial gallons of water exterminated 
the larvae of this species completely. One pound of Neoton in 40 imperial 
gallons of water killed 15.1 percent of the eggs, which were sprayed soon 
after they were laid and were kept from the rain. 
Pryeria sinica Moore 
Takai ( 59 6 ) in 1923 reported that derris spray may be used for the 
control of this species but arsenicals are more effective. 
Lepidoptera, unidentified sp. 
Daniels (89) in 1905 mentioned the successful use of derris against 
lepidopterous larvae in British Malaya. 
Schneider (363) in 1907 reported that the use of a strong milky sus- 
pension of derris destroyed caterpillars on tobacco in Sumatra. 
McDougall et ak ( 26l ) in 1912 stated that derris extractives at the 
rate of 12 ounces per 100 imperial gallons of water would destroy the 
more hardy and vigorous caterpillars. 
Ridley ( 340 ) in 1912 wrote of derris as follows: 
"Tuba root is one of the best insecticides and is the one most 
regularly used by the Chinese in the Malay Peninsula for treating 
their vegetables and other crops. The roots are pounded up in water 
and the decoction poured or sprayed over the crop, where it will kill 
all caterpillars, grasshoppers, and other insects. It is perfectly 
harmless to any plants!' 
Wood ( 498 ) in 1912 described the use of derris for the control of 
three undetermined species of small caterpillars on cabbage in the Fed- 
erated Malay States. Two pounds of crushed root was added to 2 imperial 
-lions of boiling water, allowed to soak for a few hours, and then 
diluted 1:8 for spraying. 
