402 



POLLINATION AND FRUIT SETTING 



European plums, and most peach varieties, provisions should 

 be made for proper cross-pollination when planting the orchard. 

 In addition to the self-unfruitful varieties, many, if not all, of 



Fig. 159. Lower, a branch from J. H. Hale peach tree showing one 

 normal fruit, the result of cross-pollination, and two ^^buttons" resulting 

 from self-pollination. Upper, a branch from a tree of the same variety 

 on which the fruit was cross-poUinated. (Mich. Special Bui. 188.) 



the varieties of apples, pears, and plums which are listed as 

 self-fruitful, or partly so, will usually be benefited by cross- 

 ! pollination ; at least, larger crops usually result and the June 

 ■drop, especially in bad pollination years, is less. 



