Antagonistic effects of several bacteria on Fusarium oxysporum, the causal agent of root and crown rot of onion under field conditions.
Onion (Allium cepa) is one of the most important vegetable crop which is commonly used as a food supplement. This plant is found to be vulnerable to various pathogenic infections during its growth development. Among different onion diseases, root and crown rot,caused by Fusarium oxysporum f.sp. cepa, s considered an importantfungal disease. In this study, the inhibitory effect of Bacillus cereus (isolates 22 and 52), B. subtilis (isolate 126), Pseudomonas fluorescens (isolates 48 and CHAO), benomyl fungicide and a combination of isolates CHAO and 22 and isolate 52 and benomyl were investigated on disease development under the field condition. This experiment was carried out in a randomize complete blocks with 10 treatments and three repetitions. Grouping of treatments was done at 5% level using Duncan multiple comparison test. It was also demonstrated that isolate 126 was the most effective antagonist with regard to crop yield but other treatments despite showing significant on plant growth factors were less effective in increasing crop yield.
Sharifi-Tehrani
A
A
Department of Plant Protection, Faculty of Agriculture, Tehran University, Karaj 31587-11167, Iran. asharifi@ut.ac.ir
Saberi-Riseh
R
R
Heidarian
R
R
D001409:Bacillus cereus / Q000254:growth & development*; D001542:Benomyl / Q000633:toxicity; D005659:Fungicides, Industrial / Q000633:toxicity; D005670:Fusarium / Q000187:drug effects / Q000254:growth & development / Q000472:pathogenicity*; D019697:Onions / Q000382:microbiology*; D010572:Pest Control, Biological / Q000379:methods*; D035261:Plant Components, Aerial / Q000382:microbiology; D010935:Plant Diseases / Q000382:microbiology*; D018517:Plant Roots / Q000382:microbiology; D011551:Pseudomonas fluorescens / Q000254:growth & development*; D015203:Reproducibility of Results
D005659:Fungicides, Industrial; D001542:Benomyl