-74- 
Th* harlequin bug -was confined in field oagos on cabbage at 
Hendersoarcille, N. C. A 10-percent DDT dust killed only 64 percent of 
the adult bugs in 3 days* In small tests at Alhambra, Calif., a 2.5- 
peroent DDT dust killed 55 percent in 5 days and 86 percent in 5 days. 
—White (375) . 
Solubea pugnax (F*) # the rice stinkbug 
A 10-percent DDT dust applied to adults in screen-wire cages at 
the rate of about 10 pounds per acre-applioation gave 88.5 peroent 
oontrol of adults after 2 days and 82*4 peroent after 4 days.— Ingram 
et al. (222), 
Thyanta oustator (F*) 
Same as for Adelphocorls su parous .— Loft in (247 ) • 
Same as for Chlorochroa sayi . — Smith (324 ) j Welker (368 ) • 
Corythucha cydoniae (Fitch), hawthorn lacebug 
Gesarol A-3 dust was effective against young and adults but not 
against eggs. A dust containing 0.4 peroent of rotenone plus 2 percent 
of Lethane gave a quicker and more thorough clean-up.— Bissell (87). 
Gargaphia solani Held. 
Two applications of a DDT aerosol caused 100 percent reduction of 
the eggplant lacebug. The seoond application killed newly hatched 
young •— Ditman (133; . 
Laoebugs 
A 3-percent DDT dust was effective*— Has eman (203 ). 
In one cage test on laoebugs from Pyracantha and cotoneaster orna- 
mental shrubs a 2-percent DDT dust (A-2) killed 76 peroent of the bugs 
in 38 hours and 90 percent in 72 hours*— Underhill (349 ) • 
In laboratory tests DDT dusts (l, 2, and 3 percent) and a spray 
(l pound of DDT to 100 gallons) killed most of the adults and nymphs 
within 24 hours and after 5 days only a few adults were alive. On 
September 21 a heavily infested shrub was ousted with 2 percent DDT 
and 4 days later the bugs were still numerous. By October 10 the 
shrub was again heavily infested and was dusted with 3 percent DDT. 
Examination 48 hours later showed that most of the bugs were dead, and 
by October 25 very few were seen on the treated plant but they were 
numerous on untreated plants.— Lyle (249) . 
