the potato tuberworm, phthorimaea operculella (zeller), is a major pest of potato in both store and field. in this research, host preference, biology and life table parameters of this pest were studied on leaves of 12 potato germplasm including seven commercial cultivars (agria, ausonia, sprit, satina, savalan, kondor, morene) and five iranian clones (pi396156-5, pi397045-15, pi397097-2, pi3970...