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“Otherwise, the two thistles are alike,” Kates said. “They are often found growing in adjacent patches. They are mostly biennials. They start growth in one growing season, and overwinter as a rosette of leaves. In their second season they produce a seed stalk, flower and seed and die,” he added.
Wherever curled and musk thistle go unchallenged, pasture losses are serious . Kates tells of one field where only one thistle plant each 16 square feet reduced forage yields an average of 23 per cent or some 570 pounds of dry matter per
97.0%