Among free living animals in Slovenia, wild boar (Sus scrofa) damages agricultural land by rooting and primarily by directly feeding on open fields. In some areas of Slovenia this large wildlife animal causes more than 50% of all estimated damage to cultivated plants grown on arable and forage fields. Many techniques for controlling wild boar and preventing damage are known, but none of them is optimal. In a trial for preventing wild boar ingress into maize fields different designs of electric fence system were used. The trial in which we used an electric fence to prevent wild boar from entering a maize field was erected in the area of Šmihel near Postojna (Slovenia). We decided to erect the electric fence at the end of July, after the fertilization of the maize. The following designs of electric fence systems were used: 1) a plastic post with a polywire and two polytapes with spacings of 15, 15, and 30 cm between them; 2) a plastic post with polywire and a polytape with spacings 25 and 25 cm between them; 3) a steal post as a wire offset in an inverted L shape on which three screws on rod insulators were fixed at a height of 15, 30, and 55 cm from the ground. A polytape at a height of 30 cm acted as depth and it was a so-called three-dimensional design of electric fence. No breaks through fencing were observed until the harvesting time of the maize for silage, although boar tracks on the outside of the fenced field were observed. Damage to arable fields in the vicinity of the protected field was also recorded. Divji prašič (Sus scrofa) je v Sloveniji pomembna prostoživeča vrsta. Škodo povzroča na kmetijskih zemljiščih, in sicer z ritjem in neposrednim hranjenjem. Na nekaterih območjih Slovenije predstavlja škoda po divjem prašiču več kot 50 % vse s strani kmetov prijavljene škode. Ta je vezana tako na gojene kot samonikle rastline, namenjene za živež ali živalsko krmo. Za preprečevanje škode po divjem prašiču na poljščinah je znanih več načinov; ti pogosto niso dovolj učinkoviti, so predragi ali moteči pri oskrbi poljščin. Za preprečevanje vdora divjega prašiča na koruzno njivo smo v našem poskusu uporabili začasno elektroograjo. Na območju Šmihela pri Postojni je bil izveden poskus varovanja posevka (silažne) koruze pred divjim prašičem od konca julija (zadnje dognojevanje) do spravila pridelka. Uporabljene so bile naslednje tri postavitve začasne elektroograje: 1) plastični količek z elektrovrvico in dvema elektrotrakoma z razmiki 15,15 in 30 cm, 2) plastični količek z elektrovrvico in elektrotrakom z razmikoma 25 in 25 cm, in 3) železni količek v obliki distančnika (številke 7) in višino vrvice/trakov 15, 30 in 55 cm. Elektrotrak pri slednji postavitvi je na višini 30 cm deloval kot globina oziroma tretja dimenzija. Med poskusom vse do spravila pridelka ni prišlo do vdora divjih prašičev na ograjeni del zemljišča. Na zunanji strani ograje so bile opazne sledi divjega prašiča. Škoda zaradi preučevanega škodljivca je bila ugotovljena na sosednjih njivah, ki niso bile varovane.