Abstract
The use of bioagents has become important as an alternative to
fungicides to prevent postharvest losses in recent years. In this context, it
is aimed to investigate effective of some bacterial and fungal biocontrol
agents for control against Alternari
alternata, which has a wide range of hosts, leading to losses pre and
postharvest. In this aim, dual culture of nine bacterial bio-agents isolate [Bacillus megaterium (TV 3D), Bacillus
subtilis (TV
6F, TV 17C, CP 1), Bacillus cereus
(TV 85D), Paenibacillus polymxa (TV
12E), Pantoea agglomerans (RK 79, RK
92), Pseudomonas fluorescens (MF 3)]
and 3 fungal bioagents [Trichoderma
harzianum (ET 4, ET 14, NT 1)] were tested for antagonistic properties
against Alternari alternata under in vitro conditions. It has been determined
that all bio-agents have an inhibitory effect on
the growth of pathogen fungus under in
vitro conditions. RK 79 (79.76%) was the most effective isolate in bio-agent bacteria isolates. All of the bio-agent fungal isolates showed a high hyperparasitic
effect and the most effective isolate was ET 4 (67.74%). Consequently,
promising results were obtained from these bio-agent bacteria
and fungi. It is important to carry out
studies in vivo bioassays in order to
control postharvest decay with bacterial and fungal bio-agents
which are determined to be effective.