-79- 
Although the difference between treated and control plots was highly 
significant, there was no significant difference in the results ob- 
tained with either concentration* In 1945 a single spraying with 
eaoh one of the materials was only moderately effective against a 
fairly heavy infestation, whereas in 1944 double spraying gave ex- 
cellent control of a lighter infestation irrespective of the spray used* 
In no case was there any evidence of phytotoxieity* The proprietary 
material^, which formed a better suspension, left a deposit on the fruit 
that made the earliest pickings unsalable*— Shaw (313 ) » 
Cerambyoidae 
Aoanthoolnus spp», wood borers 
Monoohaarus spp*, wood borers 
Preliminary work with TOT at Beltsville, Md*, Saucier, Miss., and 
Berkeley, Calif*, indicates that it may be an effective insecticide for 
use on valuable logs to prevent the attack of bark beetles, ambrosia 
beetles, and wood borers* Protection lasting 2 months was obtained with 
2- to 10-percent solutions in Diesel oil or kerosene* Wood borers such 
as Monoohamu s and Acanthooinus were more easily killed or repelled than 
bark beetles, and particularly ambrosia beetles* The latter require 
concentrations of at least 5 percent* The tests in Mississippi were less 
effective than those at Beltsville, the great difference in rainfall 
probably being an important factor*— Craighead and Brown (125 ) • 
Megacyllene robiniae (Forst*), the locust borer 
Adults were killed when DDT was applied as an emulsion either to 
the goldenrod on whioh the beetles feed or to the stems of looust trees 
prior to oviposition.— Craighead and Brown (125 ) • 
Chrysomelidae 
Cerotoma trlfuroata (Forst*), the bean leaf beetle 
Controlled on green and yellow string beans with one application 
of Gesarol A-3 dust.— Parker (287 )* 
In a small patoh of beans grown in a victory garden this beetle was 
controlled by 5 percent of DDT in pyrophyllite*— Granovsky (187 )* 
Chaetocnema pulicaria Mel eh., the corn flea beetle 
Good protection of young sweet corn from the corn flea beetle and 
considerable reduction in the bacterial wilt which it transmits were ob- 
tained in experimental plots of a wilt-susceptible and a wilt-resistant 
variety at Beltsville, lid. Following 5 applications of 0*66 percent DDT 
