66 STATE HORTICULTURAL SOCIETY. 



over the cement, and whereas before we had for a trunk a cylindrical 

 support which was open in places and had a rotten center, we now have 

 for a mechanical support, a closed tube Avitli a solid center which is ab- 

 solutely inrpermeable to fungus infection. 



I call your attention to the followin.a fi<>uies from a 12 acre, 50 year 

 old Baldwin orchard in wliicli I demonstrated that this work can be 

 profitably carried on in a commercial wa,y. 



Four hundred and fifty trees were treated with a total of over 1200 

 cavities. The cost of the operation and materials was: 



7 wks. labor— 3 men at |18 per wk |378 00 



3 loads sand 3 00 



24 bags cement 15 00 



Tools and repairs 15 00 



Barrel coal tar 8 00 



Total 1419 00 



Yield of the orchard — average year, bbls. . . . 1,000 

 Average price per barrel |2.50 



Total taken from orchard — average year .... |2,500 00 

 Cost of producing the crop in that locality. . 550 00 



Profit for average year |1,950 00 



Cost of tree surgery 419 00 



Thus if the work of arresting the rot prolongs the life of y^ of the 

 trees for 1 crop it pays for itself. But the life of all of the trees and 

 all of the main limbs will be prolonged for several years and several 

 crops. It is instantly evident that here is a profitable proposition for 

 the grower and he need no longer sit helplessly by and see his valua])le 

 apple trees tottering with age when they should properly be in the 

 prime of their bearing, for the application of these simple methods has 

 solved the problem of successfully combating the rots Avhich bring about 

 premature death. 



SHOT-HOLE FUNGOUS ON THE CHERRY. 



J. A. PETRIE^ KALAMAZOO. 



(Second Prize Address.) 



"Shot-hole Fungous" or the Cherry "Leaf-Spot" is a disease of great 

 importance to you people, who are growing cherries. 



When the fungous is present in the cherry or plum orchards, it causes 

 the leaves to turn yelloAv and drop prematurely, and occasionally all of 

 the foliage falls to the ground before the crop is picked. This loss of 

 foliage does not affect this year's crop so much, but by losing its leaves, 

 the tree is unable to ripen its wood properly and is apt to winter-kill. 

 It is also unable to mature the fruit-buds, which are to produce the 

 next 3'ear's crop. The food necessary for tlie ripening of the wood and 



