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Potato Worm (Potato Moth, Tuber Moth) 



(Phthorimaea operculella) 



This is a serious pest, perhaps the most serious pest of the potato. 

 It is reported all over California south of Sacramento, and though 

 known in the middle west, does not seem to be prevalent in states 

 bordering on ours. 



Cross-section of potato showing tunnels just under the skin made by tne 

 Tuber moth (Phthorimaea operculella). This is but a mild infestation. 



The worms infest not only potatoes, but other plants of that 

 family, tobacco, "sodom apple," and nightshade. 



The moth is grayish brown in color, about one-third of an inch 



