16 CALIFORNIA AGRICULTURAL EXTENSION SERVICE  [CIRC. 42 
proper spray materials should be obtained with the view of securing 
the best for the particular pests to be combatted. While it is sometimes 
advisable to make sprays at home it is now generally considered more 
satisfactory to purchase proven proprietary compounds from reliable 
spray companies. With standard materials and average sized trees, it 
costs from 6 to. 8 cents per tree including labor for each application. 
This application of the sprays or dusts to the trees is a most 
important consideration. Too many growers slight this operation. 
It is well for the grower to study the pests and to learn about their 
habits in order to apply control measures more intelligently. The 
proper timing of the application is sometimes more important than 
anything else. Thoroughness is another warning that must be repeated. 
The spray or dust should be applied to completely cover the parts of 
the tree where the pest is or will be expected. 
TABLE 3 
EXPENSES PER ACRE ON FULL BEARING ORCHARDS IN SraNIsLAUS COUNTY, 
1925-192823 
Item 
Pruning and brush disposal...........cccccccoocccorcricornn 
IrTigation. ooo 
COI TOP rssssssicsnis ia TRA mer eesterscossesescmtasen 
CULVALION. cov. eres 
PLOPDIDE cover cece 
ES E:8 CA oT SA 
Hauling to eanmery.............o.ccoooeeo 
SDLAYINE errerrecrirrriririmeis eerie seers eee oes 
MiSCRIIANEOUS. c.....covvcvvvvrroriore eee 
General eXDPenses. .......ccooovivv.ooocecrooes ooo 
IELTZALION TAXES. covrerereerrirereeroeeee eee eoooeeeooooo 
COUNY EBXOE...occrores reverence ees 
Average 
annual costs 
$26.47 
6.50 
3.12 
15.89 
28.32 
4.26 
54.04 
14.83 
13.85 
4.97 
7.72 
5.84 
8.07 
Average sub-total... $187.16 
Interest and depreciation on trees... 41.98 
Interest and depreciation on improvements............. 1.03 
Interest and depreciation on equipment... 5.46 
Interest on investment in land... 20.84 
Total ost... $356.48 
Total acres in study... 156.91 
COSTS OF PEACH GROWING 
The cost of producing peaches is profoundly modified by many 
variable factors. The most accurate and far reaching information 
regarding costs is that now being obtained by the Aericultural Exten- 
2s Data for tables 3, 4, and 6 taken from: Fluharty, L. W., F. R. Wilcox, and 
A. A. Jungerman. Summary of the peach efficiency study for Stanislaus County, 
1925-28. (Mimeographed.) Agricultural Extension Service, University of Cali- 
fornia. 1920.