One of the editors of the Rural New Yorker, in answer to the question how to kill blackberry vines, says: I have not only planted but killed out several acres of blackberry bushes during the last ten years, and have not found either a very troublesome task. Last summer I destroyed a plantation by simply mowing off the plants and thoroughly plowing up the roots. Not a plant lived, nor has a sucker appeared this season; and I attribute my success more to the time of doing the work than to the manner or thoroughness. The time selected was immediately after gathering the fruit, i. e, the first of August. The plants were then growing vigorously, and the stems and roots immature, consequently the cutting and plowing was too much even for a blackberry. This simple method is almost equally as certain in destroying noxious plants of other species, but the time must be varied to correspond with the growth of the plant, as some mature early and others late. Always select a time when the plants are making or just finishing their most vigorous growth.