Keemilise tõrjevahendi Columbo mõju traatussidele
Laen...
Kuupäev
2025
Kättesaadav alates
04.09.2025
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Naksurlased, kes kuuluvad mardikaliste seltsi, on levinud ja tõsised kahjurid maailmas. Nende vastsete tõrjumine on keeruline, sest nad elavad mullas mitu aastat ja tõhusaid insektitsiide nende tõrjeks on vähe. Lõputöö eesmärgiks on selgitada keemilise tõrjevahendi Columbo 0,8 MG mõju mullas elavatele naksuri vastsete liikumisaktiivsusele ja suremusele. Katsed viidi läbi laboritingimustes mullaareenidel, mille keskel oli Columbo 0,8 MG graanulitega ümbritsetud nisuseemned. Kaameraga filmiti 4 tunniga üles traatusside liikumist, käitumist ning hiljem analüüsiti andmeid. Püretroidiga ümbritsetud nisuseemned olid atraktiivsed ja meelitasid naksuri vastseid ligi. Insektitsiid põhjustas traatussidele vingerdamise ja liikumisaktiivsuse suurenemist kokkupuutel. Pärast nelja tundi taastus traatusside vingerdamine, kuid vastsed olid endiselt hüperaktiivsed. Katse lõpuks taastusid kõik katses kasutatud traatussid ja suremust ei täheldatud. Edasi tuleks uurida, missugused on insektitsiidi Columbo 0,8 MG surmavad doosid traatussidele.
Click beetles, which belong to the order Coleoptera, are widespread and serious pests worldwide. Controlling their larvae is challenging because they live in the soil for several years, and there are few effective insecticides available. The aim of this thesis is to investigate the effect of the chemical control agent Columbo 0.8 MG on the movement activity and mortality of click beetle larvae living in the soil. The experiments were conducted under laboratory conditions in soil arenas, where wheat seeds surrounded by Columbo 0.8 MG granules were placed in the center. The movement and behavior of the wireworms were recorded with a camera over a period of four hours, and the data were later analyzed. The wheat seeds surrounded by the pyrethroid were attractive and lured the click beetle larvae. Upon contact, the insecticide caused wriggling and increased movement activity in the wireworms. After four hours, the wriggling subsided, but the larvae remained hyperactive. By the end of the experiment, all the wireworms used in the test had recovered, and no mortality was observed. Further research is needed to determine the lethal doses of the insecticide Columbo 0.8 MG for wireworms.
Click beetles, which belong to the order Coleoptera, are widespread and serious pests worldwide. Controlling their larvae is challenging because they live in the soil for several years, and there are few effective insecticides available. The aim of this thesis is to investigate the effect of the chemical control agent Columbo 0.8 MG on the movement activity and mortality of click beetle larvae living in the soil. The experiments were conducted under laboratory conditions in soil arenas, where wheat seeds surrounded by Columbo 0.8 MG granules were placed in the center. The movement and behavior of the wireworms were recorded with a camera over a period of four hours, and the data were later analyzed. The wheat seeds surrounded by the pyrethroid were attractive and lured the click beetle larvae. Upon contact, the insecticide caused wriggling and increased movement activity in the wireworms. After four hours, the wriggling subsided, but the larvae remained hyperactive. By the end of the experiment, all the wireworms used in the test had recovered, and no mortality was observed. Further research is needed to determine the lethal doses of the insecticide Columbo 0.8 MG for wireworms.
Kirjeldus
Bakalaureusetöö
Aianduse õppekaval
Märksõnad
bakalaureusetööd, naksurlane, liikumisaktiivsus, insektitsiid, vingerdamine