Annual Report of the State Botanist. 9 



sandy soil about Manor and Eastport, wliere it makes an untlirifty 



straggling growth, its branches are badly infested by the black 



knot fungus, Ploivriglitia morhosa, but in those parts of the State 



where the soil is richer in the elements of plant food, and these 



trees make a healthy, vigorous growth, they are almost entirely 



free from this fungus. The practical application of this principle 



is plain. If we would have our cultivated and useful plants as 



free as possible from the attacks of injurious parasitic fungi, we 



must maintain their constitutional vigor and give them a full 



supply of plant food. 



KespectfuUy submitted, 



CHAKLES H. PECK 



Albany, December 10, 1888. 



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