-88- 
and 0.2 percent of rotenone gave 100 percent mortality in 48 hours, 
whereas cube with talc gave only 88.6 percent. In field experiments 
two applications of dusts of derris and talc containing 1 percent 
of rotenone and 10 percent of flour gave 96 percent control of this 
pest on cabbage and collar ds.— Arant (22, 23). 
In laboratory tests oertain natural and sulfonated vegetable 
oils combined with derris or cube increased significantly the toxici- 
ty of the rotenone material.— Pulton and Howard (206). 
Rotenone is relatively more effective than nicotine against the 
harlequin bug.— Isely (311 , p. 25). 
Spray or dust with derris or oube. This is the only insecti- 
cide recommended.— U. S. Bureau of Entomology and Plant Quarantine 
(61?). 
There is no comparable substitute for rotenone.— U. S. Depart- 
ment of Agriculture (633 , p. 14). 
Nezara viridula (L.), the southern green stinkbug 
Dusts of derris and talc were effective against small nymphs, 
but all the rotenone insecticides tried were ineffective against 
the large nymphs and adults.— Arant (22, 26). 
This species and Cuspicona simplex TEllc. are both called the 
green vegetable bug in Queensland. A derris spray containing .02 
percent of ether extractives, prepared from powdered derris-soap 
or liquid derris proprietary products, was of some value against 
the nymphs on tomatoes •—Sloan (546) . 
Rhoecoooris sulciventris (St&l), a brome orange bug 
High concentrations of derris sprays gave good mortalities in 
Queensland. The fourth-instar nymphs were more resistant than the 
adults.— Smith (553 ). 
Rhynchocorls humeral is (Thnb.) 
In Formosa control measures comprise hand collection of all 
stages and spraying with derris against the nymphs.— Takahashi ( 579 ) , 
Other pentatomids 
On cotton in Arizona 53 species of Hemiptera were found, the 
more important injurious ones being 3 species of pentatomids and 4 
