1. Introduction
Fungal and bacterial phytopathogens affect crops, and are
responsible for significant losses or decrease the quality and safety
of agricultural products. Their control relies mainly on chemical
pesticides (Agrios, 2005). Because of the growing problems
regarding resistance of pathogens on the one side and environmental
side effect on the odder, in fungal and bacterial disease control,
a numerous studies were conducted in order to identify alternative
methods for plant protection, which are less dependent on chemicals
and more environmentally friendly. Biological control, which
includes use of antagonistic microorganisms, has been a promising
alternative, to synthetic fungicides that is safer to both human
health and the ecosystem (Janisiewicz et al., 2000).