372 ANNUAL REPORT OF THE Off. Doc. 



in the apple tissue, giving the watery, instead of the whitish, opaque 

 appearance; or a sudden access of water after the cell sap has be- 

 come highly concentrated, may result similarly. 



Sun Scald is injury to the cells from intense heat. It is accom- 

 panied by abnormal ripening of tissues in the vicinity. It may be 

 aggravated by liquid on the surface of the exposed finit and is 

 frequently seen on fruit suddenly exposed to the sun's rays after 

 being shaded. 



I do not know of any explanation for the condition known as 

 Sticky Skin or Dead Skin. Microscopically the tissues in such cases 

 seem fairly normal. 



The ^Idunihnu Spot is also hard to explain in the light of our 

 present knowledge. It seems not to be due to any organism. Whether 

 or not it is related to the physiological Fruit Pit is an open ques- 

 tion. Perhaps we will find eventually that it is a trouble distinct 

 from others enumerated. It has been suspected to be a form of 

 aisenic injury, but tests made in 1911 by the U. S. Department 

 of Agriculture indicate that heavy applications of arsenic do not 

 increase the amount of spotting. It develops much more on apples 

 in ordinary storage than on those in cold storage and attention to 

 this point is advised when apples give indication of developing this 

 trouble. 



PEACH CULTURE 



By JOHN F. BOYER, Middleburg, Snyder County, Pa. 



Peach culture is very different to-day from what it was 25 years 

 ago, and in many localities the cultivation of this delicious fruit 

 has been entirely abandoned. It is, however, a fruit so well known 

 in Pennsylvania that a description is not necessary. Years ago a 

 peach tree would live to bear almost like an apple tree, especially 

 the seedling, which to-day is harder in bud than budded trees, but 

 the tree itself seems to have lost the vitality it once had and is no 

 more a longer lived tree than trees from the nursery. What brought 

 about these changes? 



I believe that Providence had a great deal to do with produc- 

 tion. It seems to me that a man is limited in all lines of production. 

 In my opinion, surely, the man who bites off more than he can chew 

 will make a flat failure in peach culture. 



It is not extensive but intensive peach culture that pays. The 

 man who can do the proper thing at the proper time is always the 

 man who offers the choicest fruits on our markets and that is the 

 only fruit that pays the producer. 



Common and poor fruit was never very renumerative with me. 

 The subject of peach culture seemed to me like a funnel, looking 

 into it at the small end, the farther you see into it, the wider the 

 subject gets. I always feel my inability to do justice to this subject. 

 The novice then would ask what the the requirements to be a sue- 



