OCR Text |
Show DISCUSSIONS OF BERRY DISEASES The Di'iiaii'iient of Agriculture has Just issued a report on "Diseases of Raspberries nnd Blackberries," of which H, O. Dodge, pathologist, and R. H. Wilcox, assistant pathologist, oillce of fruit diseases, bureau of plant industry, are the authors. The report Includes discussions of mosaic and related disease of raspberries, rasp-berries, fungous diseases of raspberries raspber-ries and dewberries, and suggestion for preparing bordeaux mixture and lime-sulphur solution. The text of the introductory paragraph para-graph follows : Most of the diseases of raspberries and blackberries are caused by fungi. The usual symptoms by which each disease may be recognized are fairly well marked. ! Certain other diseases, such as mosaic and leaf curl, though they are of an Infectious nature, are not known to be caused by fungi or other organ-Isms. organ-Isms. They occur throughout the runge of the raspberries and are be-I be-I coming so serious in some places as j to necessitate the replacement of ' .n.i lotmi, wiili other sons of berries which are more resistant. The more important fungous and virus diseases of raspberries and blackberries black-berries of the United Slates are described de-scribed and illustrated in this bulletin, bulle-tin, and practical methods for their control, when known, are given. Raspberries, blackberries, and their relatives, representing different species spe-cies of the genus Rubus, differ as to their habits of growth. On this account ac-count alone their horticultural varieties varie-ties might differ widely with regard to their susceptibility to a particular disease. dis-ease. These berries are grown as garden gar-den crops throughout the United States and commercially in many favorable fa-vorable localities. It is clear that methods worked out f ir controlling a disease, of ruspber- I ns in Michigan would not necessarily ptuve satisfactory in controlling the same disease on dewberries as grown in Georgia. It is proposed lo discuss Che diseases of raspberries and blackberries black-berries separately, although in some cases their horticultural varieties may all he subject to certain of the diseases dis-eases to be considered. |