. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. Fig. 14.—Tij) and greenhouse nozzle, complete (from Galloway). conditions would be beyond arm's length. The apparatus can be made for 50 cents, and will be found a useful instrument wherever there is sufficient water i)ressure to insure a projjer amount of force. (Circ. 17, Division of Vegetable Physiology and Pathology.) THE BLACK OE BROWN APHIS OF VIOLETS. {Rhopdlon'iplnnn rluhr Perg.) Until within five or six j^ears from the present time one of the most troublesome insects upon greenhouse violets in the vicini
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. Fig. 14.—Tij) and greenhouse nozzle, complete (from Galloway). conditions would be beyond arm's length. The apparatus can be made for 50 cents, and will be found a useful instrument wherever there is sufficient water i)ressure to insure a projjer amount of force. (Circ. 17, Division of Vegetable Physiology and Pathology.) THE BLACK OE BROWN APHIS OF VIOLETS. {Rhopdlon'iplnnn rluhr Perg.) Until within five or six j^ears from the present time one of the most troublesome insects upon greenhouse violets in the vicinity of the Dis- trict of C<)hunl)ia, as well as elsewhere, was a plant-louse known to flor- ists as the "green fl^'^or "green ; Some time in the spring of. 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. Bureau of Entomology. Washington : G. P. O.
Size: 1093px × 2287px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectentomology, booksubjectinsects, booky
