. Fig. 73. — Two forms of blue-mold: at left, Penicillium italicum; at right, P. digitatum. After R. E. Smith. chief trouble results from wounds on fruit in handling, which thus provide an entering point for the fungus. Without me- chanical injury no decay from blue-mold can occur. Hence the method of control is painstaking care in handling the fruit to prevent bruising or puncturing the skin. Black-rot ^^^ (Alternaria citri Pierce). — This disease was described and its cause given by Pierce in 1902. It attacks only the navel orange, causing from 2 to 5 per cent loss of the whole crop. It is e
. Fig. 73. — Two forms of blue-mold: at left, Penicillium italicum; at right, P. digitatum. After R. E. Smith. chief trouble results from wounds on fruit in handling, which thus provide an entering point for the fungus. Without me- chanical injury no decay from blue-mold can occur. Hence the method of control is painstaking care in handling the fruit to prevent bruising or puncturing the skin. Black-rot ^^^ (Alternaria citri Pierce). — This disease was described and its cause given by Pierce in 1902. It attacks only the navel orange, causing from 2 to 5 per cent loss of the whole crop. It is easily recognized by the prema- ture ripening which it induces, and by the deep red color and extra large size of the fruit. The diseased fruits are very conspicuous on the trees before the main crop has col-
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921
