EN
Wireworms – soil dwelling larvae of click beetles (Elateridae; Agriotes spp.) became a prevalent pest of potato crops in last years. The aim of presented studies was to determine whether potato cultivars showed a diversified level of susceptibility to wireworm damage as well as whether increased susceptibility was related to a lowering concentrations of glycoalkaloids. In 2003–2006, ten potato cultivars (7 table, 3 starch) were tested on field experimental plots in two localities: Bonin and Niekłonice. The results of performed studies revealed that cultivar Vitara was the most susceptible to wireworm damage (mean percentages of damaged tubers were 28.7 and 37.8% respectively for localities Bonin and Niekłonice), while cultivars Bard, Denar, Mila and Bryza belonged to a group of susceptible cultivars. Conversely, cultivars Koga and Pasja Pomorska showed a high level of resistance to a Elateridae larvae, possibly due to a high concentration of glycoalkaloids. A strong relationship between the level of susceptibility and glycoalkaloid’s content, suggests that these compounds are an important factor influencing susceptibility of potato cultivars to wireworm damage.