. Fig. 4-4. — Scab on California pears bought in Raleigh. Original. Powdery mildews, sphaerothocose and podosphaerose. — See apple. Scab (Venturia pyrina Aderh.). — This scab much resembles that of the apple and consists of a surface blotch or scab, often accompanied by a peculiar cracked appearance of the skin. This symptom, however, is a secondary effect which is not necessarily present. Upon the twigs rough cankers are formed. Smith ^ of California recommends plowing under or clearing away dead leaves and using a dormant spray fol- lowed by two applications of Bordeaux mixture while 1 Smith
. Fig. 4-4. — Scab on California pears bought in Raleigh. Original. Powdery mildews, sphaerothocose and podosphaerose. — See apple. Scab (Venturia pyrina Aderh.). — This scab much resembles that of the apple and consists of a surface blotch or scab, often accompanied by a peculiar cracked appearance of the skin. This symptom, however, is a secondary effect which is not necessarily present. Upon the twigs rough cankers are formed. Smith ^ of California recommends plowing under or clearing away dead leaves and using a dormant spray fol- lowed by two applications of Bordeaux mixture while 1 Smith, R. E., Cal. Agr. Exp. Sta. Bui. 163, p. 17, 1905.
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
