Akademik Veri Yönetim Sistemi
International Conference on Food, Agriculture and Animal Sciences, Sivas, Türkiye, 27 - 29 Nisan 2023, ss.345-353
ABSTRACT: Walnut (Juglans regia L.) is widely grown in the world and in our country, economic and
medical importance, belonging to the Juglandaceae family which is one of the hard-shelled fruits. Fungal
diseases, one of the biotic factors, significantly limit the production of walnut plants. Fungicides are used
in the control of fungal diseases. However, the use of bacterial bioagents as an alternative to fungicides
has gained importance in recent years. In this study, it was aimed to investigate the effects of some
bacterial strains against the brown apical necrosis causative Fusarium sp. under in vitro conditions, the
efficacy of twenty bacterial strains (16 Bacillus sp., 3 Pseudomonas sp., 1 Brevibacillus sp.) in terms of
antagonistic properties against agent was determined by dual culture test. In the study, it was determined
that the percent inhibition rate values changed between 69.80% and 90.10%. The most effective results
in in vitro conditions were obtained from Brevibacillus choshinensis (TV 53D, 90.10%), respectively by
Pseudomonas fluorescens (FDG 37, 83.7%) and Bacillus pumilus (TV 73F, 82.57%). As a result, it was
noted that these isolates are promising for controlling walnut fruit rot disease in vitro caused by Fusarium
sp. It is important to test the promising bacterial strains that are effective against the pathogen in different
environmental in vivo conditions, in terms of determining their usability as a biopesticide.