Efficiency of Fugicides in Control of Cercospora Leaf Spot (Cercospora Beticola) on Beetroot

Abstract

Cercospora leaf spot, caused by Cercospora beticola, is significant disease of plants from the family Chenopodiaceae. The disease regularly occurs on sensitive genotypes of beetroot. In order to maximise economical benefits from beetroot production and to achieve high yields, it is necessary to protect crop against this disease by using appropriate fungicides in conditions that promote the infection and disease development. In this this paper, the efficiency of fungicides on the basis azoxystrobin, maneb and flutriafol was examined. The experiment was set up by EPPO standards (EPPO PP1/1 (4)). Fungicides were applied using a back sprayer. The aim of the research was to examine the efficiency of fungicides based on various active substances in field conditions and to determine disease intensity in order to recommend the most effective fungicide. Fungicides with the highest efficiency were on base azoxystrobin (90,5%) and flutrafol (91,4%). The untreated control and plots treated with maneb showed the highest disease intensity: 10,5% and 9,5%, respectively.

Pegavost lišća cvekle je jedna od najznačajnijih bolesti biljaka familije Chenopodiaceae. Bolest se redovno javlja posebno na osetljivim genotipovima cvekle. Radi ekonomičnije proizvodnje cvekle i postizanja visokih prinosa, a samim tim i kvaliteta sirovine neophodno je vršiti hemijski zaštitu od ove bolesti, primenom odgovarajućih fungicida. U ovom radu je ispitivana efikasnost fungicida na bazi: azoksistrobina, maneba i flutriafola. Ogled je postavljen po EPPO standardima (EPPO PP1/1 (4)). Tretiranja su obavljena pomoću leđne prskalice. Zadatak istraživanja je bio da se u poljskim uslovima ispita efikasnost fungicida na bazi različitih aktivnih materija kao i da se utvrdi intenzitet oboljenja po varijantama, a cilj davanje preporuke o najefikasnijoj varijanti primene fungicida. Fungicidi sa najvećom efikasnosti po varijanti su bili na bazi azoksistrobina (90,5%) i flutriafola (91,4%), a intenzitet oboljenja je bio najmanji na varijanti tretiranom flutriafolom (0,9%) i azoksistrobinom (1,0%), dok je na kontrolnoj varijanti bio najveći (10,5%), kao i na varijanti tretiranom manebom (9,5%).