. Bulletin. Agriculture. Apr'l, 1912.] SOME APPLE DISEASES—TREATMENT. 19 and 25.) Trees thus robbed of their fohage from year to year must eventually become greatly impaired in their Fig. 22.—Early stage of Leaf Spot. The cause of the leaf spot has occasioned no little difficulty. A number of fungi have been found to be present in the spots, but inoculation experiments have indi- cated that Sphoeropsis Malorum is probably the only one that is of importance in the production of the disease. Treatment. The fact that one fungus is responsible for three different forms of disease makes its
. Bulletin. Agriculture. Apr'l, 1912.] SOME APPLE DISEASES—TREATMENT. 19 and 25.) Trees thus robbed of their fohage from year to year must eventually become greatly impaired in their Fig. 22.—Early stage of Leaf Spot. The cause of the leaf spot has occasioned no little difficulty. A number of fungi have been found to be present in the spots, but inoculation experiments have indi- cated that Sphoeropsis Malorum is probably the only one that is of importance in the production of the disease. Treatment. The fact that one fungus is responsible for three different forms of disease makes its destruction a matter of special importance and rather unusual difficulty. Spraying has been quite effective in controlling the leaf spot. In the summer of 1908 the per cent, of leaves spotted in the orchards referred to under apple scab was reduced from 97 to 26 by the use of Bordeaux and to 21 by the use of lime-sulfur solution. Five sprayings were made, but it is probable that only the first three were. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New Hampshire Agricultural Experiment Station. [Hanover, N. H. ] : New Hampshire Agricultural Experiment Station
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