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STUDIES ON DRY ROOT ROT (Rhizoctonia bataticola Taub (Butler)) OF CHICKPEA (Cicer arietinum)

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Title STUDIES ON DRY ROOT ROT (Rhizoctonia bataticola Taub (Butler)) OF CHICKPEA (Cicer arietinum)
 
Creator Wagh, Pushpanjali
 
Contributor Dantre, R.K.
Khare, N.
Verulker, S.B.
Saxena, R.R.
Kotasthane, A.S.
 
Subject DRY ROOT ROT (Rhizoctonia bataticola Taub (Butler)),CHICKPEA (Cicer arietinum)
Plant Pathology
 
Description Nine isolates of Rhizoctonia bataticola causing dry root rot in chickpea were
collected, isolated and purified from different chickpea growing area of
Chhattisgarh. The isolates differed markedly in terms of types of mycelia growth,
colony colour, sclerotial number, shape, size and number of sclerotia per
microscopic field. Isolates when paired (in all possible combinations), exhibited
self-compatibility that is fusion of wall and membrane and showed homologous
anastomosis (reaction type 3). Aggressiveness of the isolates [in vitro (blotter
paper method) and in vivo (sick soil method)] revealed differences in pathogenic
ability. Under in vitro condition the Raigarh isolate (RB 5) was found more
virulent, however, under in vivo condition the Kawardha isolate (RB 4) was highly
virulent. Isolate originating from Raigarh (RB 5) expressed more virulence when
pathogenicity assays were followed in vitro (blotter paper method), whereas isolate
originating from Kawardha (RB4) expressed virulence when pathogenicity assays
were followed in vivo (sick soil method). Inoculum (mass multiplied in sand maize
media) of Rhizoctonia bataticola isolate (RB 4) was used to screen 118 and 220
chickpea lines for tolerance to dry root rot during rabi 2012 and 2013, respectively.
During first season 2012- 2013 in Desi III only one entry was moderately resistant
(BG 3033), three entries NDG 11-12, RKG 2020 22 and H 09-90 were tolerant.
Whereas, Phule G 0752 was moderately resistant and JG 33 and CSJ 741 was
tolerant while, remaining entries were susceptible to dry root rot. Two entries RSG
9056 and CSJ 8023 were found tolerant, while remaining all the entries were
susceptible to dry root rot. While during second season (2013-14) CSJ 809 was
found moderately resistant whereas, JG 17, CSJ 808, CSJ 556, JG 24, CSJ 815,
GLK 28127, JG 27, JG 36 were tolerant. From the set of accessions of 220
chickpea entries which were undertaken during second rabi season 2014- 2015,
132 entries were screened in vitro through blotter paper method against R.
bataticola isolate RB 5 (Raigarh) which was most virulent under in vitro
aggressiveness test. Variety L550 of chickpea was used as susceptible check on
blotter paper technique (Nene et al. 1981). Out of 132 entries, 21 entries
categorized as resistant, followed by 19 entries categorized as moderately While,
21 entries grouped as tolerant, 53 entries were susceptible followed by 18 entries
were highly susceptible .
Significantly least mortality per cent (12.5%) was recorded at pH 8.0 followed
by pH 4 with mortality per cent of 41.67%.Extent of root damage varied from 3-9
grades and least disease grade was also recorded at pH 8.0 with minimum root
damage and infection that is, 3 rating, With regard to soil type, significantly least
mortality per cent (16.66%) was recorded in Matasi followed by dorsa with
mortality per cent of 20.83% which were at par with each other. Much less root
damage was too observed in Matasi with minimum infection that is, 1.6 rating,
followed by Dorsa and Bhata with disease rating 5.6. In case of soil texture
 
Date 2016-12-06T15:15:56Z
2016-12-06T15:15:56Z
2015
 
Type Thesis
 
Identifier 248 p.
http://krishikosh.egranth.ac.in/handle/1/89305
 
Language en
 
Format application/pdf
 
Publisher Indira Gandhi Krishi Vishwavidyalaya, Raipur