88 



THE APPLE LEAF HOPPER 



In 1907 the plum crop at the Experiment Station was prac- 

 tically a failure, while in 1908, although below normal, it was 

 much better than in the previous year. The results for 1908 are, 

 therefore, more reliable for basing conclusions upon. 



On the basis of a normal crop of 50,000 bushels of plums in 

 Minnesota, or say $100,000 worth, if every fruit grower would 

 spray, instead of there being only forty per cent of marketable fruit, 

 there would be, to be conservative, twice that, or 100,000 bushels, 

 an addition of $100,000 more to be divided among the fruit growers 



Fig. 85. DetaUs of Injury to apples: a, egg punctures with larvae living in the 

 pulp and the punctures beginning to decay ; b, c, d, egg punctures beginning to heal, 

 as eggs never hatched; /, badly stung portions of an apple; e, egg puncture nearly 

 healed ; g, scar in a depression.— Stednian. 



of the State. It must be remembered in this connection that the 

 Bordeaux mixture reduced the loss from Plum Rot and other 

 fungous diseases. 



Cost of Spraying: From careful data collected, we find that 

 the cost of the three sprayings on such plum trees as were used in 

 this experiment, is between ten and fifteen cents per tree. If a 

 tree bore only a bushel of plums the extra quality of the fruit, as 

 well as the lessening of the dead loss from fallen fruit, due to 

 spraying, would more than repay for the fifteen cent outlay. 



