The twospotted spider mite, Tetranychus urticae, is one of the most destructive mite species feeding on a wide range of horticultural/ornamental plants grown in greenhouses, including over 300 plant species. Twospotted spider mite is difficult to manage in greenhouses for a number of reasons, including wide host-plant range, short life cycle, high reproductive potential, rapid population growth rate, multiple generations occurring simultaneously, and resistance to pesticides (insecticides and miticides).Due to the low tolerance for twospotted spider mites, which is associated with potential aesthetic injury to plants that can reduce quality and thus marketability, the primary means of dealing with twospotted spider mite populations is the use of pesticides that have miticidal activity (miticides).

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