810 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
August 8 another examination was made when it was found that 
there was an increase in the quantity of diseased fruit which 
varied with the trees according to the treatment given, the checks 
having the greater amount and the trees sprayed with the bor- 
deaux mixture the lesser’ amount of affected apples. With the 
picking of the fruit on October 16, the apples were sorted to 
determine the effects of the treatments with respect to this dis- 
ease. The results in detail are given in Tables IV and V. The 
average results are as follows: . 
TABLE VI—EFFECT oF SPRAYS UPoN SCAB AND CopLING Moru. 
TREATMENT. Scabby. Wormy,. 
. GREENING. Per ct. Per ct. 
COCK Ge iy eee conch iis sae 152 Ss te te wees Late eae re Le a Sis ten eh eee en ee 71.0 46.5 
esBordeaux-arsenical mixtures ies. <\2 ates ci oaks bic eeea eaten tae lee riers TS 
1 Sulphur wash and 2 bordeaux-arsenical mixture..............e0e8: 4.2 9.8 
Jt Sulphur: wash i¢ fsiaes atte eo dh ba oka Wee ea mieete cies MEU ine Eee 55.5 46.4 
BALDWIN. ‘ 
CROCK eo ie nee a oe wk Santee Le Oe aR ae gee a oe Estes ar 95.3 radi eel 
aepordesux-arsenical. mixture: £. +a ck beie ne EL ae 23.0 6.8 
1 Sulphur wash and 2 bordeaux-arsenical mixture...........-2eeeeeee any. 13.4 
LAMGMO RUE SvABIY <4, vocals ave abe «, aoce 00k os 0 aha ee ae 66.5 38.3 
AVERAGE. 
Whee kere stat. Fade techs ed FR ae a nhelets Le etots GEN al. ale ee een ea 83.1 
BSEDOLOCAUX-ATSENICA]-MIXGUTE sc ccd od ok te ee ee ee ils}a8: 
1 Sulphur wash and 2 bordeaux-arsenical mixture..........eceeeeees 9.4 
Ie Sul phuirewaali as cas hate cre Oe alee Sa en eee ce ee 61.0 

In comparison with the checks the one application of the sul- 
phur wash reduced the scab by 22 per ct.; the one application 
of the sulphur wash supplemented with the customary second 
and third treatments of the bordeaux-mixture reduced the scab 
by 73.7 per ct.; and the three applications of the bordeaux-arsen- 
ical mixture reduced the scab by 69.8 per ct. 
The favorable results upon scab attending the applications 
of the sulphur washes may be partly attributable to the thinning 
of the fruit in the lower portions of the trees. For with these 
trees the larger part of the crop was produced upon the upper 
branches where the conditions with respect to shade, moisture 
and air circulation were less conducive to the development of 
scab. In none of the four other apple orchards under experiment 
was there any appreciable thinning of the fruit by the treatment 
with the sulphur washes. From these results it is believed that 
for the control of the scab an application of a sulphur wash before 
the opening of the buds may be substituted for the usual spray- 
