-72- 
Nabidae 
Nabis alternatua Parshley 
Nab la ferus (L«) 
In western Nebraska potato fields a 3-percent IDT dust and a spray 
containing 0*4 pound of IDT per 100 gallons significantly reduced the 
number of nablds»— Tate et al< (542) ; also Hill (209) » 
A 10 percent DDT-pyrophyllite dust reduoed the population of nymphs 
and adults of Nabls ferus in an alfalfa field.— Lieberroan (245 ) • 
Nabis ferus would alight on small cotton plants that had been dust- 
ed with a 3-percent IDT dust (A-S) at the rate of 25 to 30 pounds per 
acre, but moved about and did not feed; after a few seconds the action 
of the hind legs became abnormal, but the insect was able to fly 40 or 
50 feet. After 24 hours there were no Nabis ferus .— Smith (324 ) • 
Acro8ternum hilare (Say) , the green stinkbug 
Gesarol A-3 dust was slow in its action in cage tests. A very heavy 
application caused 73 percent knockdown in 72 hours.— Bwart ( 145) • 
Pentatomidae 
Ch loroohroa. ligata (Say), the conchuela in the Southwest 
Same as for Adelphooorls su jaerbu s .—Loft in (247) • 
Chloroohroa say i Stal, the Say stinkbug 
At Phoenix, Arie., on May 31, an 80-aore field of garden beans in- 
fested wi12i Lygus bugs and the Say stinkbug was treated with 5- and 2- 
percent DDT dust mixtures. On June 3 the control of Lygus was recorded 
as 100 percent in both plots; the numbers of these species taken by 50 
sweeps of an insect net in a comparable undusted plot inor eased from 83 
on May 31 to 307 on June 3. Reduction of the Say stinkbug on June 3 was 
92 percent for the 5-peroent dust and 79 peroent for the 2-percent dust. 
The percentage of viable seed produced was 92 in the 5-peroent DDT plot 
and 88 in the 2- peroent IDT plot as compared with 73 percent in the un- 
dusted plot.-- White (373) . 
Laboratory tests conducted at Phoenix, showed that 1 percent di- 
nitro-o-cresol and 10 percent DDT were equally effective, the former act- 
ing much more rapidly than the latter. Dl/T gave fair results against 
this bug in experimental plots, although these data are limited.— Hills 
and McKinney (211). 
