Laboratory investigation the efficacy of selected invasive non-native plants against slugs(Arrion spp., Gastropoda, Arionidae)

Polži so pomembni škodljivci kulturnih rastlin, saj lahko povzročijo veliko škode na rastlinah. Običajno se za zatiranje polžev uporabljajo pripravki, ki vsebujejo aktivni snovi metaldehid in železov (III) fosfat. Vendar pa so ti pripravki škodljivi ne le za polže, temveč tudi za druge organizme. Ozaveščanje pridelovalcev in javnosti o škodljivosti sintetičnih limacidov je prispevalo k povpraševanju po alternativnih načinih zatiranja polžev. V okviru magistrske naloge smo raziskovali uporabo rastlinskega materiala iz sedmih invazivnih rastlinskih vrst za razvoj alternativne metode zatiranja polžev. Preučevali smo kontaktno delovanje (v prahu ali tekoči formulaciji) in uporabnost kot prehodno oviro (posušen rastlinski material) sedmih invazivnih rastlinskih vrstjaponski dresnik (Fallopia japonica [Houtt.] Ronse Decr.), češki dresnik (Fallopia x bohemica [Chrtek & Chrtková] Bailey), kanadska zlata rozga (Solidago canadensis L.), orjaška zlata rozga (Solidago gigantea Aiton), navadni octovec (Rhus typhina L.), veliki pajesen (Ailanthus altissima [Mill.] Swingle) in navadna amorfa (Amorpha fruticosa L.) proti polžem iz družine Arionidae (lazarji). Rezultati naše raziskave so pokazali, da je material navadnega octovca, orjaške zlate rozge in japonskega dresnika vplival na sposobnost prehranjevanja lazarjev. V naši raziskavi nismo potrdili kontaktnega delovanja preučevanih rastlinskih prahov in tekoče suspenzije na lazarje. Poleg tega je več rastlinskih prahov (zlata rozga, navadni octovec) izkazalo kot učinkovita ovira pri prehodu polžev do vira hrane.Slugs are significant pests of crops as they can cause great damage to seeds, stems, and leaves. To control slugs, preparations containing the active ingredients metaldehyde and iron (III) phosphate are usually used. However, these preparations are harmful not only to slugs but also to other organisms. Raising awareness among farmers and the public about the harmful effects of synthetic molluscicides has led to an increased demand for alternative methods of slug control. As part of our master\u27s thesis, we investigated the use of plant material from seven invasive plant species to develop an alternative method of slug control. We investigated the contact efficacy (in powder or liquid formulation) and physical barrier efficacy (dried plant material) of seven invasive plant species: Japanese knotweed (Fallopia japonica [Houtt.] Ronse Decr.), Bohemian knotweed (Fallopia x bohemica [Chrtek & Chrtková] Bailey), Canadian goldenrod (Solidago canadensis L.), giant goldenrod (Solidago gigantea Aiton), staghorn sumac (Rhus typhina L.), tree of heaven (Ailanthus altissima [Mill.] Swingle), and false indigo (Amorpha fruticosa L.), against slugs from the Arionidae family. The results of our research showed that plant materials of staghorn sumac, giant goldenrod, and Japanese knotweed affected the feeding ability of slugs. We could not confirm the contact effect of the investigated plant powders and liquid suspensions on slugs in our research. In addition, several plant powders (goldenrod, staghorn sumac) proved to be effective barriers that prevented slugs from reaching a food source