. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 12 BULLETIN 658, U. S. D] PABTMENT OF AGRICULTURE. the site, made at the time the nursery was contemplated, would no doubt have resulted in the discovery of the same rust upon the near- by lodgepole pines as well as upon the Indian paintbrush plants, and future losses would have been prevented. The infection with a needle fungus x of Douglas fir seedings at the Boulder nursery, Boul- der, Mont., and the occurrence of a mistletoe upon the seedlings- were due to these diseases being extremely prevalent upon the sur- roun
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 12 BULLETIN 658, U. S. D] PABTMENT OF AGRICULTURE. the site, made at the time the nursery was contemplated, would no doubt have resulted in the discovery of the same rust upon the near- by lodgepole pines as well as upon the Indian paintbrush plants, and future losses would have been prevented. The infection with a needle fungus x of Douglas fir seedings at the Boulder nursery, Boul- der, Mont., and the occurrence of a mistletoe upon the seedlings- were due to these diseases being extremely prevalent upon the sur- rounding native trees of this species. The young and crowded seed- lings became ready hosts for the fungus, and considerable damage resulted. - -**K. Fig. 13.—Porbi weirii, brown-cedar poria. Fruiting surface. In the State nursery at Roscommon, Mich.,3 a similar proximity of native infected trees and susceptible nursery stock resulted in a serious epidemic. No less care should be taken with proposed plantation sites upon burned-over or cut-over areas. A disease survey should be made 1 Weir, J. R. A needle blight of the Douglas fir. In Jour. Agr. Research, v. 10, no. 2, i . 99-103, •". Qgs. 1917. 2 Weir. .7. It. Mistletoe Injury to conifers in the Northwest. I". S. Dept. Agr. Bui. B60, p. 35. y-'U\. 3 Kau", C. and Mains, E. B. An epidemic o'f Cronartium comptoniae at the Roscommon State Nurseries. In 17th Ann. Bpt. Mich. Acad. Sci., 1915, p. 188-189. 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
Size: 1614px × 1548px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
