20.500.12556/DKUM-75689 Povečanje učinkovitosti insekticidov za zatiranje tobakovega resarja (Thrips tabaci lind.) z dodajanjem biostimulatorja Cirkon Effectivness Increase of Insecticides for Onion Thrips (Thrips tabaci Lind.) Control by Adding a Cirkon Stimulator V letu 2018 smo na kmetiji Majerič v Moškanjcih izvedli poljski poskus, v katerem smo ugotavljali, ali lahko z dodatkom biostimulatorja Cirkon (izločki Echinacea purpurea) povečamo učinkovitost nekaterih pogosto uporabljenih insekticidov za zatiranje tobakovega resarja (Thrips tabaci Lind.) v nasadu čebule. Uporabili smo insekticide na podlagi deltametrina, spinosada, dimetoata in spirotetramata, katerim smo dodali biostimulator Cirkon. Aplikacijo insekticidov smo izvedli trikrat zapored. Oceno velikosti populacije smo izvedli 7 dni po nanosu insekticida in kasneje še dvakrat. Pri naključno izbranih rastlinah smo na 10 cm2 površine lista s štetjem določili velikost populacije. Podatke smo vnesli v Abbotovo formulo za izračun učinkovitosti. Rezultati raziskave so pokazali, da lahko z dodatkom biostimulatorja Cirkon povečamo učinkovitost insekticidov za 8 do 20 odstotkov. Pri vseh testiranih insekticidih je bil učinek podoben, iz česar lahko sklepamo, da ima sredstvo repelentni učinek na škodljivca. Prav tako smo pri vseh pripravkih ugotovili zmanjšano učinkovitost pri tretjem zaporednem nanosu (-30 %). Poskus nakazuje zniževanje učinkovitosti testiranih insekticidov. In 2018 we conducted an agricultural field experiment on the Majerič family farm situated in the settlement of Moškanjci, in order to determine if adding a biostimulant Cirkon (Echinacea purpurea extract) leads to higher effectiveness of some frequently used pest insecticides to control onion thrips (Thrips tabaci Lind.) in crop fields. We used deltamethrin, spinosad, dimethoate and spirotetramat based insecticides with the addition of the Cirkon biostimulant. We carried out three consecutive applications of the insecticides. The estimation of the pest population was made 7 days after the treatment with the insecticides, followed by two more counts. We used a counting method within the target area covering 10 cm2 of the leaf surface of randomly chosen plants. The data was entered into the Abbott formula of computing to determine the effectiveness of an insecticide. Our research results pointed to an 8 % to 20 % increase of insecticide effectiveness when the Cirkon biostimulant was added. All tested insecticides demonstrated similar effectiveness, which leads to a conclusion that the substance has an insect repellent effect. Moreover, we detected a lower effectiveness level (by 30 %) with the third consecutive insecticide application. The experiment points to lowering the effectiveness rate of the tested insecticides. tobakov resar biostimulatorji insekticidi čebula zatiranje tobacco trips biostimulants insecticides onion control true true false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2020-01-15 17:59:34 2020-01-31 10:35:00 2022-08-09 11:38:59 2020-02-01 03:10:13 2020 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 URN:SI:UM:DK:V10JQ9JS UN_Zerak_Filip_2020.pdf UN_Zerak_Filip_2020.pdf 1 B0B9D69DFAACCB5D8750C4AF95E80DE1 b1f19f007d552106edbdab6d0a308c88dce3cade454096b4385d18fe18bda754 31ee8502-7c11-11eb-bb7a-00155d0001ca 20.500.12556/dkum/5dc74525-087a-4769-bbe9-622e6dc0e532 https://dk.um.si/Dokument.php?lang=slv&id=140292 Fakulteta za kmetijstvo in biosistemske vede 0 0 0