Biology and Management of Horseweed and Hairy Fleabane in California


In recent years, increasing populations of horseweed, or mare’s tail, (Conyza canadensis) and hairy, or flax-leaved, fleabane (Conyza bonariensis) have been observed in vineyards, orchards, canal banks, and roadsides in California, especially in the Central Valley. Numerous growers, pest control consultants, and managers have complained that the recommended… (More)


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