22 ANNUAL RBPOBTfi OF DEPARTMENT OF AGRIGULTURK, 1 
gallons gave commercial oontax>] In New York, but 5 ounce- in LOO 
gallons, the amount effect ive against certain mites, did not control the 
codling moth in the Pacific Northwest. In West Virginia TDE and 
ryania showed promise against Light codling moth infestations, but in 
Indiana TDE was Less effective than DDT. In New Fork DDT was 
more effect ive against the codling moth when a] /plied with the conven- 
tional hydraulic sprayer than when applied as a concentrated spray 
with a mist blower. 
Outstanding control of orchard mites was obtained with parathion 
when used at l ounces or more of 25-percent wettable powder per 100 
gallons in all regular spray applications or at 8 ounce- in two or more 
applications in Indiana, at 5 ounces per LOO gallons in two or three 
applications in the Pacific Northwest, and at L6 ounce- in one or two 
applications in West Virginia. Other materials showing some promise 
in mite control included toxaphene, L,l-bis(p-chloropnenyl)ethanol 
(DMC)j 2,3,4,5,6-pentachloroanisole, and a mixed alky] sulfite. The 
dinitrocaprylphenyl ester of* crotonic acid. 2-laurylmercapto-2-thia- 
zoline, and bist p-cnlorophenoxy ) methane also showed promise, but in 
some instances caused injury to the fruit or foliage. 
The red-banded leaf roller was controlled effectively in Indiana and 
West Virginia with TDE at 1 quart of a 25-percent liquid concentrate 
Or 2 pounds of a 50-percent wettable powder in 100 gallons of -pray. 
and with parathion at 1 pound of a 25-percent wettable powder. In 
West Virginia liquid TDE was outstanding, apparently because of its 
ability to penetrate the webs and reach the larvae. In Indiana 1 pound 
of 25-percent parathion per LOO gallons gave far more rapid and 
greater reduct ions in numbers of larvae than 1 pound- of lead arsenate 
or 1 quart of 25 i percent TDE during the week after application, but 
at the end of 4 weeks these materials were equally effective, Para- 
thion at less than 2 pounds of the 25-percent material per LOO gallons 
began to lose effect iveness 3 to 1 week- a fter t he Last -pray. Toxa phe ne 
in a full-season schedule also kept the Leaf roller under control in West 
Virginia. 
Airain-t the woolly apple aphid in Washington, toxaphene at 1 pint 
of 50-percent water-miscible liquid concentrate per LOO gallons was 
extremely effective when used in two applications, as was also para- 
thion at either 2% or 5 ounce- of 25-percent wettable pov« A^r per LOO 
gallons. Two early-season application- of 1 pound oi technical ben- 
zene hexachloride < 12 percent gamma ) per LOO gallons also gave b 
control of this aphid, but the control aid not hold up to the end of the 
on. 
Parathion caused -erioiis injury in Mdnto-h and related apple 
vanet ies in New York, especially early in t he season, and severely rus- 
seted the fruit of the Jonathan and Golden Delicious varieties when 
used with or following the fungicide ferric dimethyl dithiocarbamate 
in I ndiana. 
Pear p$yUa 
In both the State- of New York and Washington summer applica- 
of parathion, toxaphene. and rotenone (cube root ) plus oil were 
again superior to nicotine sulfate and other materials tor pear psylla 
