Biological control of Fusarium dry rot and other potato tuber diseases using Pseudomonas fluorescens and Enterobacter cloacae

Some Characteristics of a Plant Growth Promoting <i>Enterobacter</i> sp. Isolated from the Roots of Maize

“…However, the majority of strains reported recently has been isolated from environmental sources and have been studied for their various beneficial activities. Such activities include the promotion of plant growth [21,25,26], biocontrol of plant diseases [22,23] and even the conversion of carbohydrate compounds in acid hydrolysates of hemicellulose into ethanol and other fermentation products [15]. These reports have raised the profile of E. asburiae as an industrial microorganism.…”

“…The production of ammonia is frequently reported for PGPR, a process most probably resulting from the deamination (ammonification) of the amino acids present in the peptone used for this assay. It has been suggested that ammonia may have a role in antagonism against competing flora, particularly the fungi [22,23]. Some of the Enterobacter asburiae isolated earlier were characterized as human pathogens [24] and there had been expression of concerns for safety of human health.…”

Natural Products from Plants as Potential Source Agents for Controlling Fusarium

“…They act by interfering the life cycle of the fungus, mainly in the processes of conidia germination, germ tube development, penetration and development of mycelium in the tissues of the host plant [31]. There are reports of the use of fludioxonil 5 in the control of several species of Fusarium which cause rot and common scab of potato [32]. Studies in Canada about potato crops in field conditions show the inhibition of about 70% and 90% of F. solani var.…”

“…Studies in Canada about potato crops in field conditions show the inhibition of about 70% and 90% of F. solani var. coeruleum and F. sambusinum growth, respectively [32]. Fungicides containing the active substance fludioxonil are classified by WHO as pesticides that do not present acute hazard in normal use, with LD50 greater than 5000 mg/kg [33].…”

Biocontrol of Fusarium circinatum Infection of Young Pinus radiata Trees

“…P. fluorescens reduced the severity of Fusarium (mainly F. oxysporum)-induced wilt on a variety of crops [32][33][34][35][36]. Pseudomonads produce several antifungal metabolites including cyclic lipopeptides, phloroglucinols, phenazines, pyoluteorin, and pyrrolnitrin [37] or may induce local or systemic resistance in the plant against the pathogen [38].…”