-103- 
The reduction in the larval population in the bolls after eight appli- 
cations was 53 from 2.5-percent DDT, 78 from 5-peroent DDT, 88 from 10- 
percent DDT, 62 from DDT-pyrophyllite-oryolite (2.5:22.5:75), 61 from 
DDT-pyrophyl lite-cryolite (5:45:50), and 44 from cryolite alone* In 
tests at Brownsville, where moths were caged on plants heavily dusted 
with DDT, no larvae developed in the bolls. In similar tests with 
smaller dosages of 5, 10, and 20 peroent DDT applied at the rates of 5/8 
to 3 pounds of the mixture per aore, the reduotion in larvae ranged 
from 25 to 81 percent. Small larvae crawling over a dust film of 10-per- 
oent DDT were extremely irritated but not killed, indicating that the 
reduotion in population might have been due to killing the moths before 
ovipo8ition occurred.— Loftin (247 ) . 
Sitotroga cereal ella (Oliv.), the Angoumois grain moth 
Same as for Sitophilus oryga .— Cartwright (108) • 
Oeometridae 
Alsophila pometaria (Harr.) , the fall cankerworm 
Small-scale experiments in whioh newly emerged moths were placed 
in cages the insides of which had been dusted with Gesarol A-3 dust (3 
percent DDT), showed that high mortality, in many cases 100 percent, re- 
sulted after an exposure period of 8 to 24 hours, In a number of the 
tests no eggs were laid; in others approximately 1 to 6 per female were 
deposited as compared with approximately 60 per female in untreated 
checks.— Ross (306 ) « 
In small-scale tests this pest was readily controlled with DDT in 
concentrations of 0.1 to 1 percent applied as an emulsion.— Craighead 
and Brown (125) • 
Bupalus piniarius (L.) 
Gesarol has been applied from an airplane to oontrol this insect 
in forests in Sweden.— Geete ( 165) j Anon. (59) • 
Glyph ipt erygidae 
Homadaula albltzlae Clarke, the mimosa webworm 
This webworm was readily controlled with 0.1 to 1 peroent of DDT 
applied as an emulsion in small-scale tests.— Craighead and Brown (125 ) . 
Hyponomeutidae 
Plutella maculipennls (Curt.), the diamondback moth 
As a stomach poison 2 ounces of DDT per 100 imperial gallons of 
water for all formulas tested gave kills approaching 100 percent. The 
