. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. ECONOMICS OF WEEDS 61 (3) Rootstocks or perennial roots may be starved to death by preventing any development of green leaves or other parts above ground. This may be effected by build- ing straw stacks over small patches, by persistent, thorough cultivation in fields, by the use of the hoe or spud in waste places, and by salting the plants and turning sheep on in permanent pastures. (4) The plants may usually be smothered by dense sod-forming grasses or by a crop like clo
. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. ECONOMICS OF WEEDS 61 (3) Rootstocks or perennial roots may be starved to death by preventing any development of green leaves or other parts above ground. This may be effected by build- ing straw stacks over small patches, by persistent, thorough cultivation in fields, by the use of the hoe or spud in waste places, and by salting the plants and turning sheep on in permanent pastures. (4) The plants may usually be smothered by dense sod-forming grasses or by a crop like clover or millet that will exclude the light. (5) Most rootstocks are readily I destroyed by exposing them to the direct action of the sun dur- ing the summer drought, or to the direct action of the frost in the winter. In this way plowing, for example, becomes effective. (6) Any cultivation that merely breaks up .the rootstocks and leaves them in the ground, especially during wet weather, only multiplies the plant and is worse than useless, unless the cultivation is continued so as to prevent the growth above ground. Plowing and fitting corn ground in April and May, and cultivating at intervals until the last of June, then leaving the land uncultivated during the remainder of the season, is one of the best methods that could be pur- sued to encourage the growth of coUch-grass and many other perennial weeds. Recent studies by Spillman and Gates have shown that the rootstock grasses, like quack grass, Bermuda grass, and Johnson grass, are readily killed out by allowing the fields to become meadows and pastures, so that a dense sod will. GiOI/DENROD SEEDHEADS. 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
