- IIQ - 
co^n'oined with a puitable ac'iiosivc, ?uch p.f the rosin-rosidur- c-nulsion of 
Goodhuo and PlGnin:^-, arc at presscnt thr 'nost rffp.ctix*o prctcct^^ats for the 
foliag^"^ of American elm trees against the ravages of the Japanese "beetle, 
Thesf combinations ma}'- "be usrd without fear of injur,'' to, or a building up 
of conspicuous j-esidue on, such trees-. An application should be nadr- prior 
to any heavy invasion by this insect ^'nd the spray should "br repeated as 
soon as any reinfestation is noted. Derris pcvrder was us'^d at the rate of 
^ pounds per 100 gallons of wat^r plus 2 or U pints of thr rosin-rosidue 
emulsion. 
Scarabacidae (unidentified sp.) 
Coc':ch^fer booties in a rose garden may be controll'^d by spraying th'= 
folia.~e with lead ars~n'=tr (3 pounds per 100 imprri^l g-''llons of ^-^atrr) ^nd 
watering thr roots with Derriscl 1:600. — Andrics (ig) in IP'^S. 
Scolytidae 
H;^maothencm.us rruditus V/cstw. 
Feeds on derris roots in stora.? . — Corbett (Sb) in I93I; Federated 
M?>lr.y States DeT>artment of Ajericulture ( 12U) ; prA xMillrr (2^5) in I93U. 
Scolv'tup scolytus (F.), a larg' elm. '^ngrp.vrr brrtle 
The adults are sensitive to derris dust and derris sinra.'"; but. the larvae 
arc not affected by dusting with derris. Dusting mixtures containing 0.25, 
0.5, ^nd 1.0 p'-rcent of rotrnone and 0.6, 1.2, and 2.U percf^nt of ether ex- 
tract g'lve respectivrly J 32, ?5, ?^nd 96 percent of dead insrcts. — De Bussy 
et al. (61) in I936. 
Not affpct'-d by derris. ~Y^n der La?n (252). -in.I'n36. 
Fransen (1U6) in 1937 r-pcrt-' t'-'at in n Tr'-li'iinary investigation 
of thr effect of derris on S; scclytus ad^ilts shaken up with a powder contain- 
ing 1 perc-^nt of rotrnon^:^ for 5 minutes, then blown clean anr( placed in a 
chamber at 10^' C. [50° F,] wore all dead the. next dai', • wh' reas only 2 per- 
cent of a batch tree ted in the seme w^^y with wheat -flcur died. In another 
test dis'':s of felt du'^ted vrith derris powder wrrr blown pnd be.atrn so as to 
leavp only traces of the po^rder. a11 br-etles Vp-rt betwe-^n two such disks 
(held 0.^ inch arjart by a vrire ring) for 15 hours at 10° G, died, whereas 
95 percent cf thrsc between disks treated with whe-?t flour sur-'-ivcd. 
S tephanoderes hampei Ferr. , a coffee-berry borer 
Fricdrichs (IU7) in 192U report<"d th-^ results of tests .in J^va with 
Phytophyline, which is stated to be r pror^ri't'^ry preparation of the root 
cf iJcrrJji ellipticii. and soap. This frep.'^ration proved ineffective, and too 
costly for use against the coffer-berry borer, 
Crfvndrup ( 155 ) in 1Q2U rer)ort ^d te^to mad.^ in Javn for the control of 
the CO ffe, --berry borer. A special "Antibor'-r Phyt(^philinp" had no cff.^ct 
in cither laboratory or field tri-'ls. 
