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PEAR GROWING IN CALIFORNIA. 

 Treatment. 



As the fungus spends the winter on foliage that has fallen to the 

 ground the spores being discharged from this dead foliage in the spring, 

 it is necessary to get rid of all leaves in the orchard in some manner so 

 that the spores can not infect the new growth. On account of the fer- 

 tilizer value of the leaves they should not be burned or destroyed, but 



FIG. 161. Pear infected with scab. (After R. E. Smith.) 



should be plowed under, in which case there would be no chance of the 

 spores getting into the trees. This in itself is not sufficient for control 

 as there will be spores on the trees and spraying is always necessary 

 in orchards where scab is present year after year. 



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