Location of Cambium 



Where is the cambium was a question asked at a recent twilight meeting 

 during which grafting was discussed. The cambium is a single layer of living 

 cells which lies between the bark and the sapwood. If you peel the bark on an 

 apple tree this time of year, a slippery, sticky substance on the wood (sapwood) 

 and inside of the bark can be detected by eye and feel. This substance consists 

 largely of cells which make up the cambium region. 



As the tree grows, cambium cells divide to produce bark on the outside and 

 wood on the inside. 



---William J. Lord 



Hard Rooms 



On the tour of Hudson Valley CA rooms in March, it was noted that some 

 growers had what they called "Hard Rooms". These CA rorans are operated at 32°F, 

 2.0 to 3.0 per cent carbon dioxide and 3.0 per cent oxygen. Red and Golden 

 Delicious, Rome, Northern Spy, and Stayman can all be stored together in such 

 roans* 



One storage operator used polyethylene box liners for his Golden Delicious 

 to prevent shrivel. The box liners were not folded over the top of the apples 

 in order to prevent too high a humidity which may increase the incidence of rots. 



Dr. Robert Smock (Cornell University) favors a heavily waxed paper liner over 

 the polyethylene box liners. He has found that the htjmidity will be higher in the 

 polyethylene box liner but if the fruit is inoculated with spores, rots like blue 

 mold can grow rapidly. He has found that waxed paper liners have given results 

 intermediate between no box liner and the polyethylene box liner in the reduction 

 of shrivel, scald and decay. 



—William J, Lord 



Apple Color Sports 



Several growers recently asked about the color sports of Delicious that are 

 now being tested by the various Agricultural Experiment Stations. Some of these 

 Delicious are early coloring and others in addition to being early coloring are 

 "spur- type". It has been reported that the spur- type Delicious trees develop 

 more lateral fruit buds than regular Delicious, are more productive and have 

 trees that are 2/3 or 3/4 the size of regular Delicious at maturity. The main 

 difficulty is that it requires considerable testing of the various sports before 

 recommendations can be made. Many of the observations made on these sports have 

 been made in Washington. A sport that does well in Washington does not neces- 

 sarily do well in Massachusetts. At the present time many of these apple color 

 sports are being tried in the University orchard and when Information becomes 

 available as to the results of these trials, it will be made available. Some 

 growers may want to try some of these apple color sports on their own farms. 



