.This disease is best known in California on the peach and is referred to as the California peach blight, shot-hole and Fruit Spot. In that state it was given special attention in the years 1907-1909. It has also been noted in New York. In foreign countries it is not unknown, having been recorded from Australia as early as 1882, and an epiphytotic was reported from Algeria in 1904. Small, reddish spots at first with light centers then becoming dark-green to black, are produced on the fruits (Fig. 41). The foliage is spotted; the affected areas are brown, but soon these fall away, leaving a shot-hole effect in the leaf (Fig. 42). Fruit - buds are sometimes killed as a result of an attack prior to blossoming. Recent records indicate that the disease is not easily controlled. (More complete discussion under Peach, page 311.)
Fig. 41. - Coryneum Blight disease on apricot fruits.
Fig. 42. - Coryneum Blight disease on apricot leaves.
Smith, R. E. Report of the plant pathologist. Apricot disease investigation. California Agr. Exp. Sta. Bul. 203: 33 - 37. 1909. Stewart, F. C, Rolfs, F. M., and Hall, F. H. A fruit disease survey in western New York in 1900. New York (Geneva) Agr. Exp. Sta.
Bul. 191: 305. 1900. Smith, R. E. California plant diseases. Apricot. Shot - hole and fruit spot. California Agr. Exp. Sta. Bul. 218:1095. 1911.