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EFFECT OF RHIZOBACTERIA ON PHYTOPHTHORA MEADII,FUSARIUM OXYSPORUM F. SP. VANILLAE AND COLLEOTRICHUM VANILLAE INFECTING VANILLA

DSpice at Indian Institute of Spices Research

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Field Value
 
Creator SUSEELA BHAI, R
KUMAR, A
 
Date 2008-08-12T08:35:19Z
2008-08-12T08:35:19Z
2008
 
Identifier Journal of biological Control Vol.22(1):33-41 (2008)
0971-930X
http://hdl.handle.net/123456789/438
 
Description Rhizobacterial isolates, Pseudomonas fluorescens (5 isolates), Enterobacter agg/omerans (one isolate) and Bacillus spp. (14 isolates), were screened for growth promotion and against rot pathogens of vanilla such as Phytophthora meadii McRae, Fusarium oxysporum f.sp. vanillae and Colletotrichum vanillae Massae. All the rhizobacterial isolates tested except Bacillus polymixa (isolate IISR909) and one Bacillus sp. (isolate IISR915 ) were inhibitory to P. meadii to an extent of 74 percent, while F. oxysporum was highly inhibited (91.0%) by Bacillus po/ymixa (isolate IISR909) in vitro. Bacillus sp. (IISR153) was highly inhibitory to C. vanillae with an inhibition of 77.8%. The maximum growth promotion in terms of shoot length (27cm) in vanilla was observed in plants treated with P. fluorescens (isolate IISRI3). Different combination of isolates found promising as growth promoting such as P. fluorescens isolates (IISR6, IISR853) B. lentus (IISR906) B. polymixa (IISR909) E. agglomerans (IISR912), Bacillus spp. (isolates IISR910, IISR9l3, IISR9l4, IISR9l5 and IlSR149 ) as well as suppressing the rot pathogens, viz., P. fluorescens (isolates IISR6, IISR51, IISR853), Bacillus spp.(isolates IlSRI47, IlSRl48 and IISRI52), were tested against root rot of vanilla caused by F. oxysporum f. sp. vanillae. The consortia of rhizobacterial isolates, viz.,I)- P. fluorescens isolates (IlSR13, IISR51), Bacillus sp. (IISRI52) and B. polymixa (IlSR909); 2)- P. fluorescens isolates IlSRI3, IISR51), Bacillus sp .isolates ( IISR148, IISR149, IISRI52, IlSR 907) , B. polymixa (IISR909) and B. lentus (IlSR 906); 3) P. fluorescens isolates (IISR6, IISR13, IISR51), Bacillus sp. isolates (IISRI47, IlSRI51, IISRI52, IISRI53) and B. polymixa (IISR909); and 4) P. fluorescens isolates (IISR6, IISR5.1, IISRI47, IlSRI48, IISR149 and IISR907) and B. lentus (IISR906), gave significant disease reduction (88.22- 92.85%) when compared to control. However, among the four rhizobacterial consortia, 3 showed the maximum disease reduction of 92.9%.
 
Format 27150470 bytes
application/pdf
 
Publisher Society for Biocontrol Advancement
 
Subject colletotrichum vanillae
consortium
fusarium oxysporum
PGPR
phytophthora meadii
rhizobacteria
vanilla planifolia
 
Title EFFECT OF RHIZOBACTERIA ON PHYTOPHTHORA MEADII,FUSARIUM OXYSPORUM F. SP. VANILLAE AND COLLEOTRICHUM VANILLAE INFECTING VANILLA
 
Type Article