16 



A Bulletin on Orchard Practice 



treating for this pest it is advisable to use an elbow on the 

 end of the spraying rod, and direct the spray downward into 

 the crotches with considerable force. F. A. H. 



APPLE SCAB. 

 BY W. H. LAWRENCE. 



This is the most destructive disease of the apple that oc- 

 curs in the state. The fungus that causes the disease has 



SCAB on the Apple. 



two stages the winter stage which lives in the dead and de- 

 caying leaves during the winter and the summer stage which 

 lives on the leaves and fruit during the summer. 



The form in the dead leaves continues to grow during the 

 winter. Sometime in late winter or early spring capsules are 

 formed inside the leaves. Each capsule contains numerous 

 spores. About the time the leaves on the apple tree begin to 



