. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. MUSTARD FAMILY (Bmsmccae) whMoj) (carkria iraha) - Category I Noxious Weed Whitetop (hoary cress) is a perennial reproducing by seed and rhizomes. It has numerous erect stems 1 to 2 feet high that are branched at the top. An extensive root system spreads both horizontally and vertically with frequent shoots arising from the root stock. The plant seems to be gray green due to many fine hairs on the leaves. The leaves are simple, alternate, oblong, toothed and the upper leaves
. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. MUSTARD FAMILY (Bmsmccae) whMoj) (carkria iraha) - Category I Noxious Weed Whitetop (hoary cress) is a perennial reproducing by seed and rhizomes. It has numerous erect stems 1 to 2 feet high that are branched at the top. An extensive root system spreads both horizontally and vertically with frequent shoots arising from the root stock. The plant seems to be gray green due to many fine hairs on the leaves. The leaves are simple, alternate, oblong, toothed and the upper leaves have a broad clasping base. The flowers are white, four parted, about 1/8 inch wide and borne in flat-topped clusters. Seed pods are slightly flattened, two-valved, heart-shaped with a prominent persisting style. The seeds are oval, slightly flattened, granular with reddish-brown seed coats. Whitetop is naturalized from Europe and found throughout the United States except in the Southcentral area. It is found in pastures, cultivated fields, hay fields, meadows, waste places, and roadsides. It is most common in western and central Helpful identificaiton tip: Many white flowers with four petals develop into bladder-like seed capsules in mid-summer. Whitetop A. Plant Habit B. Flower C. Silicle D. Seeds „.... 142. 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 Montana. Dept. of Agriculture; Hinck, Laura; Johnson, Kim; Mullin, Barbara H; Montana. Agricultural Sciences Division. Helena, Mont. : Montana Department of Agriculture
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Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollect, bookleafnumber152, booksubjectweeds
