. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. SUNFLOWER FAMILY (Astcracm) Diffuse Kmjjwd (cmtaurca Mm) - Category 1 Noxious Weed Diffuse knapweed is a biennial or short-lived perennial forb that grows to a height of 1 to 3 feet. It has a taproot and only one or very few stalks. The tip of each branch has a single flower head. The flowers are most commonly white with the upper portion of the bract narrowing to a distinct spine. Often the outer most flowers are sterile. The bracts are yellowish green with a light brown ma
. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. SUNFLOWER FAMILY (Astcracm) Diffuse Kmjjwd (cmtaurca Mm) - Category 1 Noxious Weed Diffuse knapweed is a biennial or short-lived perennial forb that grows to a height of 1 to 3 feet. It has a taproot and only one or very few stalks. The tip of each branch has a single flower head. The flowers are most commonly white with the upper portion of the bract narrowing to a distinct spine. Often the outer most flowers are sterile. The bracts are yellowish green with a light brown margin. Seeds are achenes, dark brown, 1 inch long, with faint pale brown or ivory lines. Diffuse knapweed grows well in dry sites and is found on waste grounds, fields, and along roadways in many areas of western Montana. The most serious infestation is located near East Diffuse Knapweed A. Plant Habit B. Young Rosette C. Leaf D. Flower Head E. Flower F. Achenes Helpful identification tip: Bracts under the flower have yellow spines with teeth appearing as a comb along the spine margins. 130. 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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Keywords: ., bookcentury1900, bookcollectionamericana, bookl, booksubjectweeds
