Alternaria dauci (palež lišća mrkve) i učinkovitost mjera kemijske zaštite nekim novijim fungicidima | Alternaria dauci and sucees of chemical measurements of protection with some newer fungicides

Croata. Tijekom 2014. i 2015. godine izvršeno je ispitivanje djelotvornosti kemijske zaštite mrkve od napada patogena Alternaria dauci (Kuhn) Groves & Skolko-uzročnika crnog sušenja te paleži lišća mrkve, u selu Stajkovci u okolici Grada Skoplja. Tijekom analize ispitana je učinkovitost zaštite od napada patogena Alternaria dauci (Kuhn) Groves & Skolko novijim fungicidima u usporedbi s nekim starijim fungicidima, tretmanom u različitim uvjetima (oborine i vlage), odnosno u relativno vlažnoj 2014. godini i 2015., koja je bilježila manje oborina. Izvedenim pokusima utvrđeno je da je u 2014. godini, s mnogo oborina, najbolja djelotvornost postignuta primjenom fungicida Score 250 EC (difenakonazol) s indeksom učinkovitosti od 81,45%. Nešto manji indeks učinkovitosti 79,99%, te 79,53% pokazali su fungicidi Sighnum (boskalid + piroksistrobin) i Quadris (azoksistrobin). Fungicidi Dithane M-45 (mankozeb) i Kocide (bakarni hidroksid) pokazali su indeks učinkovitosti 68,38% ,odnosno 70,91%. Pri ispitivanjima u 2015. godini (manje oborina), najbolji indeks 93,62% pokazao je fungicid Score 250 EC (difenokonazol). Dobru učinkovitost je pokazao i fungicid Quadris (azoiksistrobin) s indeksom učinkovitosti od 91,97%. Nešto slabija učinkovitost je zabilježena kod fungicida Dithane M-45 (mankozeb) s indeksom učinkovitosti 75,85%.

Inglés. The control of the carrot Alternaria leaf blight diseases caused by Alternaria dauci (Kuhn.) Groves & Skolko is actual problem. This paper shows results of the chemical control of Alternaria dauci (Alternaria leaf blight) on the carrot and there are presented results of application with some new fungicides. The examination is done in 2014 and 2015 year in village Stajkovci near Skopje, Republic of Macedonia. The most efficacious fungicide applied in this research were Score 250 EC (difenoconazole) with 81,45 % of efficacy, Sighnum (boscalid + pyraclostrobin) - 79,99%, Quadris (azoxystrobin) - 79,53% of efficacy of protection with Alternaria dauci in 2014. Fungicide Score 250 EC (difenoconazole) efficacy was 93,62% and Quadris (azoxystrobin) efficacy was 91,97% in 2015 year. Fungicide Dithane M-45 (mancozeb) application index of efficacy in 2014 was 68,38% and in 2015 it was 75,85%. In 2014 fungicides Kocide (copper hydroxide) application index of efficacy was 70,91%, and in 2015 index of efficacy was 76,13%.