Bacterial leaf spot of common fig in Serbia

Abstract

During last several years, it was monitored occurrence of common fig necrotic leaf spot on tries grown in Smederevska Palanka vicinity in Serbia. Type of symptoms observed on diseased leaves indicated bacteria as a potential causal agent. Since the symptoms occurred in several consecutive seasons, samples of the affected leaves were collected in order to study etiology of the disease. In all the cases isolations resulted in bacterial colonies. In pathogenicity tests symptoms of natural infection were reproduced confirming the bacterial nature of the disease. The results of conventional bacteriological tests indicated that causal agent of the disease is bacterium Pseudomonas syringae.

Poslednjih nekoliko godina praćena je pojava nekrotične pegavosti lišća na pojedinačnim stablima smokve u okolini Smederevske Palanke. Tip promena na obolelom lišću ukazivao je na moguću bakterioznu prirodu oboljenja. Kako su se simptomi iz godine u godinu redovno ispoljavali, prikupljani su uzorci lišća i fitopatološki obrađivani, radi utvrđivanja etiologije uočenih promena. Izolacijom iz obolelog tkiva uvek su dobijani sojevi bakterija. Proverom patogenosti izolovanih sojeva, reprodukovani su simptomi prirodne infekcije i potvrđena je bakteriozna priroda oboljenja. Rezultati proučavanja bakterioloških karakteristika ukazuju da se radi o bakteriji Pseudomonas syringae.