. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. 28 FARM FRIENDS AND FARM FOES lies in exterminating them to as great an extent as possible. And it is especially important that there be cooperation to this end among all the landowners of a locality. POISON IVY Poisonous Trees and Shrubs The Choke Cherry is one of the commonest and most dangerous of shrubs. It is found along roadsides, woods and fences, throughout the greater part of Canada and the United States. Its seeds are scattered everywhere by birds, and it spreads
. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. 28 FARM FRIENDS AND FARM FOES lies in exterminating them to as great an extent as possible. And it is especially important that there be cooperation to this end among all the landowners of a locality. POISON IVY Poisonous Trees and Shrubs The Choke Cherry is one of the commonest and most dangerous of shrubs. It is found along roadsides, woods and fences, throughout the greater part of Canada and the United States. Its seeds are scattered everywhere by birds, and it spreads rapidly by un- derground stems. As the leaves wilt after the bushes are cut, Prussic acid, a virulent poison, is formed within them by the combination of two nonpoison- ous substances. This is often fatal to cattle that feed upon the withering branches. Conse- quently it is desirable to prevent the growth of Choke Cherry bushes, and to leave no freshly cut leaf-bearing branches within the reach of stock. Black Cherry leaves also develop this poison as they wither, and perhaps the same is true of other wild cherries. Certain species-of Laurel, especially the Mountain Laurel and Sheep Laurel or Lamb-kill, are poisonous to stock. The leaves and green stems contain a principle that is even more fatal than strychnine. Among the more important shrubs that are likely to spread from walls and fences into the adjacent fields are the various species of Sumachs. The seeds of these are left along fences by birds, and the resulting plants, when. 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 Weed, Clarence Moores, 1864-1947. Boston ; New York : D. C. Heath & Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbenefic, bookyear1910
