. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CONTEOL OF ARGEoSTTINE ANT IX CALIFOKXIA. 17 large trees supjport aerial colonies during the warm season and not infrequently colonies have been noted in midwinter. Several methods of freeing banded trees were tried. The first method was to spray the trunk and main branches with such insect- icides as carbolic-acid emulsion or distillate emulsion -immediately after banding, the application being made with a compressed-air pump holding 3 gallons. This proved too slow and ineffective, as ants are actively engaged thi'oug
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CONTEOL OF ARGEoSTTINE ANT IX CALIFOKXIA. 17 large trees supjport aerial colonies during the warm season and not infrequently colonies have been noted in midwinter. Several methods of freeing banded trees were tried. The first method was to spray the trunk and main branches with such insect- icides as carbolic-acid emulsion or distillate emulsion -immediately after banding, the application being made with a compressed-air pump holding 3 gallons. This proved too slow and ineffective, as ants are actively engaged thi'oughout the tree during the day. It was soon observed that the eurly morning was the proper time to. Fig. 7.—Plumber's torch for applying certain sprays to rid a banded tree of ants. destroy the ants above the bands, for they are sluggish at the cool temperatures and have the habit of congi'egating in crotches or in their aerial nests. The compressed-air pump was soon discarded in favor of a plumber's hand torcli (fig. 7), in wliich gasoHne or a weak cyanid solution was used as a spray. This in turn gave way to the use of pyre thrum or other ant powders which proved simple of appli- cation, economical, and immediately effective. Nests in tree crotches or elsewhere could be quickly freed by a single application, and for this purpose either a small bellows or shaker (fig. 6) proved satis- factory. « 48155°—21—Bull. 9G5 ^. 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: 1449px × 1724px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
