- 117 - 
Hoc'.gkiss ( 189 ) iii 1°37 rrcoTi^nd-^d dcrris for the r)rotrction of 
'^arly riprnine; pep.ches r.nc. pla-n? pgp.inpt the Jr-pamsp beetlr. T ,^ sprr>r 
consistf! of 3 pounds of dorris powdrr (U percent of rotonoac), 3 pcunr.s 
of ropin-residue emulsion (See ij. .S. Dept. Agr. Cir, 237, rev. 193^); 
^nd 100 g-'^llons of vrp.ter. Start spraying as poon as the "beetloF get 
into the orchard and apply l-^ter treotrnents ev-r.y 7 or 10 dayp, 
C. L. Sn.ith (2Ii) in 1937 report.' d that a sprpy of derri^ povrd^r 
(^ percent of rotcnonr) U poujidp p'-r 100 gallons of water, plus 2-1/2 pounds 
of coconut-oil scat) (anhydrous Ijpsis), w^s sprayed on Japanese "beetler in- 
festing iiarigcld. At th'^; end of 2h hourr- Ug percent were killed; at the 
■^nd of ^8 hours 82 percent vr-'-re killed. The pl'^nts sprayed with derris 
rrt-'in-d a r^arkod rcp-^llency and pr'"-"-ent- d a r-'^inf estation for rt le^.st 
3 days. 
St'~qrns ( "^55 ) in 1937 reported that derris with ro<^in residue ^is a 
sticker provrd highly effrcti"''-" as a foliag-- prot.-ctant agp.inst t'le ravag-s 
of the Japanese beotle in Delaware. 
Britton and Johnson (_57.) in 1^38 reported on th-- control of th- 
Japanese Dretle in Connecticut. As a prot'^ cti-'e spr'^y for flovrrring nolant^, 
derris povrder (U to 5 perc-nt of rotenone) ^ I/3 pound in 10 gallons of wati'-r, 
will not leeve an undesira.tile residue ?>nd gi-'^fs ^ fair degree of efficiency, 
Eerly ripening perches and plu"is may "be protf-ctf^d ty spraying with 3 pounds 
of derris cont^^ining U percent of rotrnon- and 3 pounds of rosin-resieTue enul- 
sion in 100 gallons of wat'T, provided orch_ard sanitation is pr^ctic-d. This 
spray .oes not leave p.n o"b,1ectionabl" residue on the fruit at harv^sttime. 
Dir-tz and Pierpont ( 102 ) in IQ38 r-Tiorted te^.t-^ to deter'^in° th."- vrlue 
of t'.e-rri^., phenothiavjine, tetranethyl thiure-i disulfide, and other aateriPls 
as foliage protectants ag?.in?^t the ra-"-ag-'^s of th^' Jnp--nese "brctle. S-orays 
that included derris w-^re as followc;: 
Fcunds per 
Mat^rip.l gallon of vjp t<r 
T-trarnethyl thiur-"-,--. .Usui fide 1,25 
Derris 1.25 
Rosin-re'^id^i.e -lulsien l.Oj 
Ground derris U.OO 
Ro sin-re sidu^- enul^ion U..00 
Derris U.OO 
Rosin-residue ^nulsion (sp-^cial) ^.00 
Th^ results^ iudicat-d that ground lerris ^nd ^ t-tr^rn^-thyl thiurqn 
disulfide fixture (SO percent active) nr- nt preoont the .nost eff-ctive 
foliag-^ protectants against the ravages of the Japanec^ "beetle. Applications 
should "be nad'- prior to h--";- invasion "by this insect -'•nd the proper a allies i •"'=■; 
should "be used. 
The New Jersey State Agricultural Experi-mnt St-.tion (298) in IQ38 
reported th?t Japanese beetles were repelled fro-n feeding for U to 8 dpys 
or -lore by the application of ? spray of derris or' cube pcwder plus rosin- 
resir'.ue enulsion in water, Derris or cube pov/der used at the r-^tc of 3 
pounds to 100 gallons of vat.-r ^'ith 3 pounds of rosin-r --si 'ue emulsion 
