单词	defoliator
释义	defoliator /diːˈfəʊlɪeɪtə / noun 1An adult or larval insect which strips all the leaves from a tree or shrub.Insecticides kill insect defoliators and vectors of deadly human diseases such as malaria, yellow fever, plague, and typhus.... The caterpillars of the gypsy moth are destructive defoliators that feed primarily on oak trees causing growth loss, crown dieback, and tree mortality. The spruce budworm is a major insect defoliator of forests in northeastern North America, with balsam fir and white spruce figuring as the most vulnerable species. 2A machine that removes the leaves from a root crop.Another invention at Hughs's lab, a two-row prototype thermal defoliator, offers hot air as an alternative to chemicals for removing cotton leaves before harvest.
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