-88- 
periments and with a power duster in another ranged from 41 to 49 per- 
cent; a duet containing 0.5 peroent of rotenone gave from 96 to 100 
peroent oontrol. In field experiments at Columbus, Ohio, spray suspen- 
sions containing as high as 100 pounds of the 10-peroent DDT dust per 
100 gallons of water did not control the Mexioan bean beetle.- Wh ite 
(373). 
Stethorus punotum (Leo.) 
Entirely absent from codling moth plots receiving DDT but common 
on adjacent plots treated with lead arsenate and oil*— Ross (506 ) » 
Unidentified Cocoinellldae 
No ooooinelid or ohrysopid eggs were observed on the fruit or foliage 
of a Bartlett pear orchard in the Sacramento River area, California, whioh 
has been sprayed with DDT •—Borden and Jeppson (91) • 
DDT significantly reduoed the number of lady beetles on potatoes 
in western Nebraska*— Tate e£ al. (542) • 
A pyrophyllite dust containing 10 peroent of DDT reduoed the popu- 
lation of ladybirds on alfalfa.— Lieberman (246 ). 
Oryzaephllus surinamensls (L.), the saw-toothed grain beetle 
In preliminary tests with DDT in California saw-toothed beetles in 
stored raisins were controlled.— Baker and Porter (81) • 
The addition of 60 p.p.m. of DDT to seed wheat (12-peroent moisture 
oontent) killed all introduced adults at the end of 1 week. The addition 
of sufficient 3-peroent DDT dust to give a oanoeutration of 16 p.p.m. of 
DDT killed all adults after 2 weeks.— Cotton at al. (120 ) • 
Cuoujida© 
Laemophloeus ferruginous (Staph.), the ruat-red grain beetle 
Almioide dust containing 2.6 peroent of DDT when mixed with wheat 
1:40,000 killed 100 peroent of these beetles within 6 days.— Ross (506 ). 
DDT combined with an inert mineral dust and mixed with wheat was 
completely effective against rust-red grain beetles in mixtures as low 
as 1 part of the dust in 40,000 parts of wheat.— Smallman (522) . 
Curoulionidae 
Anthonomus eu genii Cano, the pepper weevil 
In a field experiment at San Clemente, Calif*, against the pepper 
weevil on bell peppers, DDT dusts at 10, 5, and 2.5 percent yielded high- 
