At 55° F., the rate of injury was much greater still. Other kinds 

 of nursery stock (apples, plums, and cherries) were compared with 

 pear trees for susceptibility to injury, and none was as suscept- 

 ible as pears. However, most showed some injury from the ethylene 

 storage. 



We do not know how widespread is the practice of temporarily 

 placing trees in fruit storages, but we suspect that it is done 

 fairly commonly, especially in years when the soil warms slowly. 

 We also suspect that injury has occurred without storage being 

 recognized as the cause. Fruit growers should become aware of this 

 danger and use caution when storing trees. 



Trees shoul 

 really necessary 

 tions should be 



3 

 4 

 5 



Do not 

 Before 

 so that 

 (As lit 

 Mai ntai 

 m i n i m i z 

 Do not 

 than is 

 Exami ne 

 age. L 

 buds , a 

 for era 

 be fill 

 observe 

 mortal i 

 Do not 

 absol ut 

 tive to 



d not be put into fruit storages unless storage is 



If it is necessary, then the following precau- 

 taken . 



put the trees in a room still containing fruit, 

 using an empty storage room, allow it to air out 



any accumulation of ethylene can be dissipated, 

 tie as 1 ppm can cause damage.) 



n a low temperature (near 32°F.) in the storage to 

 e the danger of injury, 

 allow the trees to remain in the storage any longer 



necessary . 



the trees at the time they are removed from stor- 

 ook for white, feathery growth protruding around 

 t the base or tip of laterals, or around cuts; or 

 cks in the stem (especially near the tip) that may 

 ed with soft, pasty growth. If these symptoms are 

 d, injury has occurred and poor growth and tree 

 ty can be expected. 



hold pear trees in a fruit storage unless it is 

 ely essential, for pear trees are extremely sensi- 



ethylene injury. 



*************** 



POMOLOGICAL PARAGRAPH 



Name and Addresses Wanted : County Extension Offices, the Massachu 

 setts Department of Agriculture and the Extension Pomologist at 

 the University of Massachusetts receive frequent inquiries from 

 the public concerning names and addresses of growers that special 

 ize in "Gift Packages" and/or "Pi ck-Your-Own" method 

 fruits. If you sell gift packages or let the public 

 fruit, send us a note so that a list can be prepared 

 future inquiries. 



of harvesting 

 pick their own 

 to help answer 



*************** 



