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Insects associated with broom snakeweed (Xanthocephalum sarothrae) and threadleaf snakeweed (Xanthocephalum microcephala) in west Texas and eastern New Mexico.
Both broom snakeweed and threadleaf snakeweed are toxic to cattle, sheep, goats, and other animals and Andres (1971) suggested that the conservation and augmentation of endemic phytophagous insects are feasible and advantageous in many cases.