Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Susceptibility of potato cultivars to the potato tuber moth Phthorimaea operculella Zell.

Abstract

Fifteen potato cultivars were tested for their reaction to P. operculella (potato tuber moth; PTM) using artificial infestation. Plants were scored for PTM leaf damage and, after harvest, tubers were incubated for 10 days at 25-27°C and scored for PTM damage. There was a good correlation between the rate of larval infestation in the leaves and tubers except for cv. Frisia, which had highly susceptible leaves but a low percentage of infested tubers (8.4%). Ailsa, Escort, Blanka, King Edward and Russet Burbank were fairly resistant. Cara, Maris Piper, Desirée and Nicola were moderately resistant and Frisia, Asterix, Spunta, Pentland Squire, Diamant and Alpha were susceptible.