. Noxious weeds and how to destroy them [microform]. Weeds; Weeds; Mauvaises herbes, Lutte contre les; Mauvaises herbes. u Ball Mustard. Ball Mustard. This in one of the new weeds in grain fields. From the rapidity with whicli it spread all through the west, there is no doubt tliat it is a weed which must he fougljt vigorously by farmers. It is alarmingly abundant in Manitol>a and the North West Territories wherever wheat is grown. Specimens have also been received from British Columbia, Ontario and Prince Edward Island. Ball mustard is a rather slender erect annual (or winter annual) two o
. Noxious weeds and how to destroy them [microform]. Weeds; Weeds; Mauvaises herbes, Lutte contre les; Mauvaises herbes. u Ball Mustard. Ball Mustard. This in one of the new weeds in grain fields. From the rapidity with whicli it spread all through the west, there is no doubt tliat it is a weed which must he fougljt vigorously by farmers. It is alarmingly abundant in Manitol>a and the North West Territories wherever wheat is grown. Specimens have also been received from British Columbia, Ontario and Prince Edward Island. Ball mustard is a rather slender erect annual (or winter annual) two or three feet high. The leaves on Mie stem are arrow-shaped and are cov- ered with star-shaped hairs. The flowers are orange yellow, so that the plant is easily recogniz- ed at a distance when growing in a crop; they are about ^ of an inch in diaraetar and aro borne in clusters at the end of the branches. The small roundish, single-seeded pods on slender foot- stalks are borne thickly all along the gradually lengthening branches. The cut shown herewith has Ijeen kindly loaned by tho United States Department of Agriculture, and was first used in Circular No. 10 by Mr' Lyster H. Dewey, "Three New Weeds of the Mustard Family" to whom our thanks are tendered. The cut shows at a the tip of a plant a quar- ter of the natural size, at 6 a pod natural size and at c a seed enlarged. Pepper Grass. This plant is a native annual or winter annual. As a rule, it is not ery troublesome in crops : but under certain climatic conditions it be- comes an enemy of no small importance. During 1896 no weed was more frequently sent in as a pest in wheat lands, and at meetings of farmers held during the same summer in Manitoba, this weed above all ' others was tho one inquired about. At similar meetings in 1897 it was only men- tioned once, viz., at Glenboro, Man. Pepper Grass is a slender herb 12 to 18 inches high, which developes in the shape of a miniature tree with a central stem and a lar
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