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Management of Fusarium wilt of tomato by application of bioagents and salicylic acid.

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Title Management of Fusarium wilt of tomato by application of bioagents and salicylic acid.
Not Available
 
Creator KK Pandey, RC Gupta
 
Subject Tomato,Fusarium oxysporum ,Bioagent
 
Description Not Available
Among all the biocontrol treatments tested in
glasshouse condition in sick soil, A. niger-V was found highly
antagonistic and completely checked the foliage yellowing,
wilt incidence and vascular browning (Table 2). It was
followed by A. niger-V + B. subtilis and A. niger-V + P.
fluorescens where neither foliage yellowing nor wilt
incidence was observed. However, minimum vascular
browning with lowest mean rating scale (0.33) waswas better than higher concentration (50 ppm). The complete
inhibitory effect of SA (5-25 ppm) on wilt incidence was
consistently maintained from 7 days to 21 days and it may
be due to systemic acquired resistance. The higher dose
(50 ppm) of SA was not effective to reduce wilt incidence
rather toxic to the plants. Root bacterization with an
antagonistic rhzospheric microorganism (P. fluorescens)
reveled that as the inoculum concentration of P. fluorescens
increased from 106 to 1010 cfu/ml, the potentiality also
increased to control Fusarium wilt of tomato. The wilt
incidence was cent percent checked at 1×109
and 1×1010
cfu/ml concentration of P. fluorescens after 21 days of
treatment (Table 3). The higher dose was more effective at
28 days of incubation as the wilt incidence was only 30%
with 1×1010 cfu/ml while 50% with 1×109 cfu/ml
concentration. The increased activity of phenylalanine
ammonia lyase (PAL), peroxidase (PO), poly phenyl oxidase
(PPO), phenolics, chitinase and ß 1-3 glucanase reported
in tomato plants bacterized with P. fluorescens isolate PF1
and prevented the establishment of F. oxysporum f.sp.
lycopersici (6). The maximum induced systemic resistance
by P. fluorescens may be at the concentration of 1010 cfu/ml
for the management of Fusarium wilt of tomato.
Not Available
 
Date 2021-08-05T07:39:53Z
2021-08-05T07:39:53Z
1001-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/53220
 
Language English
 
Relation Not Available;
 
Publisher Indian Phytopathological Society