|
Abstract: Out of 50 isolates of fluorescent pseudomonads isolated from casing mixtures, 34 produced siderophore. After a preliminary screening six siderophore producers and a non siderophore producer were selected to study their biocontrol potential. In in vitro dual culture tests against eight parasitic fungi affecting mushroom, isolate Clc reduced growth of Sepedonium and Verticillium sp. Isolate Cllb highly antagonistic against all the pathogens except Cladobotryum sp., Fusarium sp. Neurospora sp. and Verticillium sp. significantly however, isolate CVIa effectively suppressed the growth of Sepedonium sp. Fusarium sp. and Mycogone sp. Isolate CHIb, CIVa and Cllld were almost ineffective against most of the pathogens. In order to outline the potential of bacterial isolates in control of pathogens in mushroom beds the isolates found in in vitro tests were used further in casing. The isolates Clc and Cllb worked very well in control of Sepedonium sp. in mushroom beds, while significantly higher yield was recorded by using isolate Cllb and CVIa against Fusarium sp. The pathogens Neurospora sp., Trichoderma sp., Verticillium sp., Mycogone sp., were best controlled by isolates Cllb. The paper reveals that the siderophore producing bacteria isolated from casing are useful in controlling the pathogenic fiingi of Agaricus bisporus.
Full text download: ISMS subscribers
ISHS members & pay-per-view
Translate:
   |