. Diseases of forest and shade trees, ornamental and miscellaneous plants in the United States in 1921. Trees Diseases and pests United States; Plants, Ornamental Diseases and pests United States. 478. Fig. 97- distribution of leaf blotch of rose in U. S. as reported to the Plant Disease Survey. Dates of earliest appearance of Fhra/^midium spp. of the rose: May 27, Illinois Juno 2, Oregon August 11, California. / \ E ; R \. i / / \ \ \ R R â i R\ R'. V ..J ^ Fig. 98- Gt-ographical distribution of rose rust in the U. S. as reported to the Plant Disease Survey. Crown gall caused
. Diseases of forest and shade trees, ornamental and miscellaneous plants in the United States in 1921. Trees Diseases and pests United States; Plants, Ornamental Diseases and pests United States. 478. Fig. 97- distribution of leaf blotch of rose in U. S. as reported to the Plant Disease Survey. Dates of earliest appearance of Fhra/^midium spp. of the rose: May 27, Illinois Juno 2, Oregon August 11, California. / \ E ; R \. i / / \ \ \ R R â i R\ R'. V ..J ^ Fig. 98- Gt-ographical distribution of rose rust in the U. S. as reported to the Plant Disease Survey. Crown gall caused by Bacterium turnefaciens LFR i-. Tovm. Indiana - general prevalence, causing severe damage and about 75^ reduction in yield, affects the Ophelia rose and is apparently being distributed on the roots of diseased stock by the nurseries. (HET) ka important disease especially in the nurseries. (T£jhon) Texas root rot caused by Ozonium omnivorum Shear Texas - general in central eastern section of state, prevalent, about 2% reduction in plants found in the state in tl:e black Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Martin, G. Hamilton; United States. Plant Disease Survey. [Washington, D. C. ] : Plant Disease Survey, Bureau of Plant Industry, United States Department of Agriculture
Size: 1950px × 1282px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1922
