SPRAY MANAGEMENT 17 



FAIR CONTROL 



The four-spray schedules, Figure 11, on page 16, illustrate the spray 

 programs of individual farms that secured fair to good commercial con- 

 trol. All farm operators applied the four major sprays, one put on late 

 maggot spray, and one operator applied three additional sprays. 



Farm Cl 



This is a small low-yielding orchard. A small horse-drawn 100- 

 gallon sprayer and a crew of two men were used in putting on four ap- 

 plications. A total of 59 hours were required in applying 6350 gallons. 



Farm C2 



This small orchard of 200 trees consisted mostly of two plantings; 

 the largest block being 20-year-old trees, the other of 35-year-olds. The 

 11,650 gallons were applied in l50]/ 2 hours by means of a small one-man 

 crew. The orchard was a minor enterprise on this farm and spraying 

 had to fit into the operator's total schedule more closely than on other 

 fruit farms. He applied five moderately heavy sprays. Seventy-seven 

 gallons were applied per machine hour. The calyx spray was applied in 

 37 hours. 



Farm C3 



Farm C3 is a small orchard. Seventy-four of the 400 trees were 

 over 30 years old and a large proportion of the others were seven to 10 

 years old. A two-man crew was used in operating a small 100-gallon- 

 tank outfit. The 2950 gallons were applied in 32 1 / 2 hours. Thirty-five 

 gallons were used per mature tree equivalent. 



Farm C4 



Farm C4 is a small scattered orchard. Some of the trees are diffi- 

 cult to get at on account of rocks and rough topography. In the case 

 of shifting winds it is almost impossible to get into position to cover ade- 

 quately all parts of each tree. This is a very good example of the effect 

 of poor site condition on the control of scab and pests. About 130 trees 

 were over 30 years old. A two-man crew, using a 150-gallon-tank out- 

 fit, applied 11,255 gallons in 124 hours. Seven moderate applications 

 were used. Twenty-one hours were required to apply the calyx spray. 

 From the point of view of control, this operator was handicapped by lo- 

 cation of orchard and by the large number of old trees.- This makes it 

 difficult thoroughly to protect the trees even with a large number of 

 sprays. 



Table 3— Data on Orchardists Cl, C2, C3, C4 for 1932 



