Rajesh Ramarathnam

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Bacteria, isolated from canola and soybean plants, produced antifungal organic volatile compounds. These compounds inhibited sclerotia and ascospore germination, and mycelial growth of Sclerotinia sclerotiorum, in vitro and in soil tests. Ascospore germination in cavity slides was inhibited 54–90% by the volatile producers. When mycelial plugs or the(More)
Leptosphaeria maculans causes blackleg disease of canola (Brassica napus L.). Bacteria isolated from soil, canola stubble and plant parts were assayed for suppression of blackleg. In plate assays, the bacteria isolated from canola stubble had the highest agar-diffusible antifungal activity (75%), which was fungitoxic. In plant cotyledon assays, endophytes(More)
Antibiotic-producing Pseudomonas chlo-roraphis strains DF190 and PA23, Bacillus cereus strain DFE4 and Bacillus amyloliquefaciens strain DFE16 were tested for elicitation of induced systemic resistance (ISR) and direct antibiosis in control of blackleg in canola caused by the fungal pathogen Leptosphaeria maculans. Inoculation of bacteria 24 h and 48 h(More)
Bacillus species are well known for their ability to control plant diseases through various mechanisms, including the production of secondary metabolites. Bacillus subtilis DFH08, an antagonist of Fusarium graminearum, and other Bacillus spp. that are antagonists of common fungal pathogens of canola were screened for peptide synthetase biosynthetic genes of(More)
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