Large thrips populations that existed in all plots of alfalfa at 
the time of dusting were practically eliminated with DDT used in the 
form of a 10-peroent dust in pyrophyllite*- Lieberman (245 ) • 
HEMIPTHIA 
(Suborder HOMOPTERA) 
Aleyrodidae 
Trialeurodes abutilonea (Haldeman) 
One application of a 3-peroent DDT dust (Gesarol A-3) on eggplant 
was made September 16 at a rate of 40 pounds per acre* One week later 
the number of nymphs on the underside of the basal leaves averaged 76 *8 
per leaf on the dusted plots and 38 *6 on the undusted plots. It is be- 
lieved the DDT reduced the number of predaceous insects, especially 
larvae of Chrysopls sp* — Ewart (145 ) • 
Trialeurodes sp*, greenhouse whitefly 
A 3-percent DDT dust was effective in the gr ee nh ouse.— Haseaan (203 ) 
There was some indication that 1*2 percent of DDT in oil applied as 
a vapo-spray was effective against whiteflies on peas»- Lange (241) ♦ 
Aphiidae 
Anuraphi8 roseus Baker, the rosy apple aphid 
At Vincennes, Ind», early in April 1944, it was noted that trees 
sprayed with several formulations of IDT in 1943 had very low or no aphid 
populations, although adjacent trees were heavily infested* In 1944 DDT 
was slow in eliminating all three species of apple a phi da already pres- 
ent, but they disappeared by midseason* The apple grain aphid and the 
rosy apple aphid disappeared earlier from the trees treated with DDT 
than they did from the untreated trees*— Baker and Porter (81)* 
DDT has shown promise in the oontrol of apple aphids* — Steiner _et 
al. (334) . 
Dormant miscible oil, containing DDT in solution, applied to give 
5*12 ounces of DDT per 100 gallons, was inferior to a conventional ovi- 
cidal tar-petroleum miscible oil in killing the eggs of the rosy apple 
aphid, but did reduce early bud infestation markedly as compared with 
untreated checks* DDT in oil permitted multiplication of the spring and 
early summer population of the aphids much more than the tar-petroleum 
spray*— Cleveland (114) • 
