. FiG. 32. — Scab on California pears bought in Raleigh, N. C. Original. duces the familiar cedar-apple upon the cedar tree. The pear rust of the West is a distinct species, with the incense cedar as the alternate host. The remedy, as in the case of the apple, consists in re- moving all red cedar trees from the neighborhood of the pear orchard; thus eliminating the source of infection. When this is impossible, the pear trees should be sprayed with Bordeaux mixture immediately after the early rains which cause the gelatinous horns to emerge on the cedar- apple, and thus furnish the of s
. FiG. 32. — Scab on California pears bought in Raleigh, N. C. Original. duces the familiar cedar-apple upon the cedar tree. The pear rust of the West is a distinct species, with the incense cedar as the alternate host. The remedy, as in the case of the apple, consists in re- moving all red cedar trees from the neighborhood of the pear orchard; thus eliminating the source of infection. When this is impossible, the pear trees should be sprayed with Bordeaux mixture immediately after the early rains which cause the gelatinous horns to emerge on the cedar- apple, and thus furnish the of spores for the spring infection. This disease of pears is particularly abundant upon varieties of the Japanese strain. Powdery-mildews. See apple.
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1920, bookyear1921
