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APPENDIX. 



No. 1. — Diseases and Insects. 



Peach trees are liable to certain diseases, one of 

 the most dangerous of which is canker. Its cause 

 is uncertain. Some ascribe it to abrupt atmo- 

 spheric changes ; others to stagnant water at the 

 roots ; others, again, think unripe wood and 

 exaggerated pruning together are the chief causes 

 of this disease. Canker is a kind of ulcer, and 

 the sap vessels thereby pour out their contents -and 

 weaken the part affected. It is recommended to . 

 clear out the diseased portion, and apply a weak 

 decoction of oxalic acid. 



One kind of canker attacks the young shoots, 

 and destroys their circulation. 



Blister is a well-known disease of the Peach. 

 It is rare in the orchard-house ; but in the case of 



