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Fle-iing p.nd Metzgor ( li-'3 ) in IQ36 publishrd inf or^r-.tion on th^- control 
of tho J-^poncso "bf^otle on fruit ?,nd ph.<^.-\o treas. Pcachrrs th^i.t riprn in July- 
can "bp protected ty spraying with 3 pounds of derris, containing U percent 
of rotpnonc, and 3 pounds of ropln-residuo e-nulsion in 100 gallons of water, 
provided orch?rr. s^.nitr>tion is practiced. Preriaturely ripening or diseased 
fruit should be reriovrd fron the trees, a'^ such fruit is attacked by the 
be<-:tles, even when thoroughly coated with the spray residue, and when this 
fruit is consumed the beetles begin to fnrd on the sound fruit. All fruit 
on thf ^.Tound should also be removed, as its odor attracts beetles. A thin 
paste of derris is poured into the spray tank after the rosin-residup e-nul- 
sion and water havr b'-en added. The spray of derris-rosin residue c-nulsion 
is ?lso r-comendf^d for early ripening varieties of pluns. 
Header ( igU ) in IQ36 recon'i.ended, ns on'' of the n.atprids to -nqke 
foliege nnd fruit un^ttractiv to the adult Japanesf^ br-etle, a mixture of 
3 pounds of T)owdered derris (containing: U to 5 percent of rot mono r.nd 16 to 
18 percent of pcetonr extractives) plus 3 pounds of rosin-re?:idue rmul-sion 
(G-oodhue's formula) to 100 gallons of wat.-^r. 
Metzgrr ( 2B2 ) in I936 called attention to the derris plus rosin-r.-sidu-^ 
spr<^y as a repellent for Japanese beetles attacking early ripcni'ig peaches'. 
Three poixnds of derris (rotenone = U percent; total acetone extractives = 
16 percent or more) plus 3 pounds of 50-porcent rosin-residuu emulsion are 
used to 100 g^-llons of water. The fir<5t application of this spr-'^y should be 
m^.'> wh'-n the b'-^etlrs first ar>pe?>r in thf^- orchnrd, ^^nd subseouent applic- 
ations should follow Pt intervals of 7 to 10 d^ys, the number of applications 
depending on the degree of inf est-'^tion in the vicinity. 
Van Gv.ndia (Uoo) in I936 reported th^t control of th- Js>panese beetle 
with ar)plications of rotenone dust, ripde from either cube or derris, was un- 
s^tisfectory. He said: "We are not particularly interested in killing thpm 
by contact vhere the foliage is sacrificed, but v;e are interested in ke.ping 
thorn aw^y from thos'^ treated plants," 
Baker and Fleming, in a typewritt-n report in January 1^37 on the work 
conducted during the summer of 1Q"=:6, on the protection of ^^pples and peaches 
from'Ptt^ck by the p.dult Japanese beetle, st^»trd that various derris ccm- 
bin-itions wer. tested in an attempt to increase the period of effectiveness 
of derris. Derris plus-rosin-residue e^.ulslon, the lc*=st expensive com- 
bination tepted, was as good as eny oth- r. The addition of rosin, rosin- 
phenol, or rcin-zino oxide did not improve the spray combine tion from the 
standpoint of of f<^ctiv-ness in controlling the beetle. 
In Febru-ry 1937 these author--- stat'"'d in a typewritten report th^t a 
spr^y containing 3 pounds of derris (rotenone U percent) end 3 pour^Ais of rosin- 
residue emulsion P'r 100 gallons of water maintained in effecti^-e control 
"gainst adult Japanese beetles on pzftleps for 11 days; and in Ma.rch 1<^'37 
they (2U) reportt d tests of spreys for protecting orn^^mentnl plants ag?inst 
J-panese beeti" attnck. Derris end rosin-residue emultjlon maintained an 
effective cent'rol on a.zale?>s for 11 days, showing thf't this spray. was as 
eff'-cti"-e und>-'r conditions in the cof^^merci^'l nufsery as in the orchards, 
Bromley (^) in 1^37 stated th^-t derris or cubr vrith rosin-re = idue 
emulsion is p promising repellent for the Jjipant.se beetle. 
