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potato tu·ber·worm | \ -ˈtü-bər-ˌwərm 
, -ˈtyü- \
, -ˈtyü- \Definition of potato tuberworm
: a grayish-brown moth (Phthorimaea operculella) whose larva mines the leaves and bores in the stems and tubers of the potato plant and often attacks other solanaceous plants (such as tobacco and tomato)
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The first known use of potato tuberworm was in 1894
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