V diplomskem delu smo na podlagi preučitve tuje literature predstavili pojav in vzroke odpornosti (rezistence) repičarja (Meligethes aeneus [F.]) na sintetične insekticide. Škodljivec lahko v ugodnih razmerah povzroči veliko gospodarsko škodo na oljni ogrščici (Brassica napus L. var. napus) in oljni repici (Brassica rapa subsp. oleifera). Repičar se hrani s cvetnim prahom. Poškodbe dela samo na zaprtih cvetovih, saj s tem, ko išče cvetni prah, v cvetovih izjeda luknje. V zadnjih letih se v nekaterih državah Evropske unije že opaža odpornost repičarja na določene sintetične piretroide. Pojavljajo se osebki, ki brez škode prenesejo koncentracije aktivnih snovi, ki na večino drugih osebkov iste vrste delujejo smrtno. Nastanek rezistence je selekcijski proces. Ta se začne, če je v neki populaciji le malo osebkov, ki imajo dedno določeno majhno občutljivost proti neki aktivni snovi in zaradi te lastnosti preživijo zatiranje s to snovjo. Pri večkratni uporabi pripravkov na podlagi te aktivne snovi se v naslednjih rodovih najprej počasi začno kopičiti dedne zasnove (geni) za odpornost, pozneje pa se sorazmerno hitro izoblikuje populacija osebkov, v kateri so vsi odporni in jih je mogoče zatreti z zelo visokimi koncentracijami aktive snovi ali pa sploh ne. V diplomskem delu smo poskušali raziskati vzroke odpornosti škodljivca in preučiti, kako se je mogoče procesu odpornosti izogniti ali ga vsaj upočasniti.In diploma thesis, primarily based on foreign sources, the development and causes of resistance of the pollen beetle (Meligethes aeneus [F.]) to synthetic insecticides is presented. In favorable conditions, the pest can cause significant economic damage to the oilseed rape (Brassica napus L. var. napus) and rape (Brassica rapa subsp. oleifera). Pollen beetle feeds with pollen. It damages only closed flowers while searching for pollen. Damage is seen as a little holes in the flower. In recent years, some countries in the European union have already noted the resistance to certain synthetic pyrethroids. There are specimens that transmit harmlessly to the concentrations of active substances, which work on most other specimens of the same species. The emergence of resistance is the selection process. It begins if there is only a small number of individuals in a population who have a heredity of a small sensitivity to an active substance and because of this reason they can survive suppression with this substance. In the case of repeated use of the preparations based on this active substance, next generations will begin to accumulate hereditary contepts for resistance. The later populations of specimens which are ressistant can be suppressed with very high concentrations of the active substance or can not be suppressed at all. In my work we tried to study the causes of resistance of pollen beetle and examine how the resistance process can be avoided or at least slowed
