Hammad Nawaf Farhan, Miss Ashwaq Talip Hameed, Mr. Heshim Mohammed Aobad
الملخص العربي
This report contains some experiments conducted under incubator conditions to test the ability and
efficiency of some species of Pseudomonas bacteria as biocides to inhibit some plant pathogenic fungi like
Pythium, Alternaria and Fusarium, in Complete Randomized Design (CRD) with three replicates. For this
purpose five Pseudomonas species 1) Pseudomonas putida1; (2) Pseudomonas putida2; (3) Pseudomonas
fluorescens3; (4) Pseudomonas fluorescence4; and (5) Pseudomonas chlororaphis, were chosen as a bacteria
produced siderophores compounds which were collected previously from Iraqi soils. To test the ability of these
bacterial isolates to inhibit the growth of 3 different plant pathogenic fungi (Alternaria sp, Pythium sp, and
Fusarium sp) under the incubator conditions and to find out the best among the five isolated bacteria in
inhibition growth of the three plant pathogenic fungi. Secondly, to make a comparison between effects of
Pseudomonas as Biocides and Dithen fungicide in inhibition fungi growth. Results showed that Pseudomonas
putida2 and Pseudomonas fluorescens3 were the best among the five isolates in their ability to inhibit growth
of the three fungi significantly. Pseudomonas putida2 & Pseudomonas fluorescens3 were significantly higher
effect as Biocides on fungi growth more than Dithen fungicide.
أ.د/ حماد نواف فرحان | Prof. Dr. Hammad Nawaf Farhan | 7129