-66- 
Phaenacantha marcida Horv. 
Excellent control of the adults on sugar csnein Formosa was 
given by a spray of nicotine sulfate, while one containing a 
proprietary preparfition of derris and soap was slightly less ef- 
fective.— Takahashi (578 ). 
Miridae 
Caloooris fulvomaculatus (Deg.), shy bug 
The active stages of this bug on hops in England are controlled 
by niootine or derris sprays applied to the vines.- Ha86ee (400) . 
Campy lomma verba sci (Meyer), mullein leafbug 
Nicotine, pyrethrum, and derris sprays in combination with 
wetting agents gave good control.— Cameron ( 100 ). 
Following a serious outbreak on apple in Nova Scotia, a pro- 
prietary rotenone spray (Berako) was applied. A marked reduction 
in infestation was observed, but not complete control.— Pickett and 
ooworkers (467) • 
Bngytatus tenuis Reut. 
A considerable reduction in the numbers of this insect was 
brought about in Sumatra by the application of a spray containing 
0.2 percent of derris powder (10 percent of rotenone) and 0.1 per- 
cent of 8oap.~Laan (350 , p. 56). 
Helopeltis antonii Sign. 
A mixture of derris and talc considerably reduced the number 
of both nymphs and adults on cacao in Java in 1938. In large-scale 
field experiments in 1940 the preceding result was confirmed, and 
it was shown that even on full-grown trees this pest could be con- 
trolled satisfactorily by applications of a derris dust containing 
0.76 percent or rotenone (l part of derris powder of 10-peroent 
rotenone content mixed with 13 parts of talc), with a resulting in- 
crease of orop yield. In 1941 it was confirmed that thorough ap- 
plications at fortnightly intervals of a sufficiently fine derris 
dust were very effective.— Betrem (46, 47, 48). 
aelopelt3s can normally be controlled on tea in Java by a derris 
dust (0.75 percent of rotenone). The rate of application for dust- 
ing ranges from 2.7 to 7.2 pounds per aore, but if a heavy infesta- 
tion spreads to the whole plantation, up to 27 pounds per acre must 
be used, whioh is usually unremunerative.— Verbeek (639) . 
