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INVESTIGATIONS ON FUSARIUM SOLAN/ CAUSING CHILLI WILT

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Title INVESTIGATIONS ON FUSARIUM SOLAN/ CAUSING CHILLI WILT
 
Creator Patil, Mohankumar J
 
Contributor Raut, Dr. B. T.
 
Subject null
 
Description "Chill! (Capsicum annuum L) IS the most Important vegetable
and spice crop belonging to the family Solanaceae of subtropics and
tropics. Chilli is a nattve of South Amenca and its culttva tion was known
to the people of Peru since prehistoric time and plays a vital role in
Indian economy
The chillies are well known for their flavour, pungency and form
important source of vitamin C. In ripe chillies the vi tamin C content has
been found to be much higher than in tomatoes and a rich source of
ascorbic acid"
"Chilli (Capsicum annuum L ) 1s an important commercial spice
crop of Ind ia. Some pathogens cause economic losses among which
wilt caused by Fusarwm so/ani (Mart) Sacc. is a serious problem now
a days.
ix
Survey conducted in different geographical areas of V1darbha
indicated that wilt incidence ranged between 2.50 to 32.50 %
.Max1mum y1eld loss was noticed in Amaravat1 70.39 % followed by
Wardha (62.64 %) and mmimum 1n Nag pur district (54.22).
Fusarium so/ani showed a great deal of variation in cultural ,
morphological and pathological characters. Among 48 isolates
collected from different geographical region of Vidarbha and 4 received
from Raichur. Karnataka. 7 isolates were non- pathogenic, 10 weakly
pathogenic, 14 moderately pathogenic.12 strongly pathogenic and 9
were highly pathogenic isolates.
Methods of inoculation also reflect the differences in virulence of
isolates; however FS-3, FS-18, FS-28 and FS-33 were more
aggressive in producmg w1l!.
Under host differential react1on studied it was revealed that all
the varieties viz. X-235, G-4. Pusa Jwala, Phule Jyoti and Jayanti
tested against potent1al of d1fferent Fusarium so/ani isolates such as
FS-28 (HPt), FS-22 (NPt), FS-23 (WPt), FS-39 (MPI), FS-9 (SPI) and
FS-14 (MPI) had shown susceptible to moderately susceptible react1on
Among the different media studied, Potato Dextrose Agar was
preferred by most of the isolates for luxuriant growth, sporulation and
pigmentation.
Among the carbon sources evaluated, FS-32 preferred dextrose
(81.83 mm) for growth followed by FS-32 (79.33 mm) and FS-14(72.83
mm) in mann1tol and fructose respectively. Cellulose was less preferred
by the Fusarium isolates. Urea and potassium nitrate as n1trogen
source supported, FS-22 (87.17) and (87.00 mm) Ammonium nitrate
favors the growth of FS-3 (70.83 mm). Ammonium sulphate was less
preferred by F.solam isolates. M1crometric variation t.e. size of conidia
also differed from isolate to Isolate.
Most of the isolates were highly sensitive to carbendazim and
thiophanate methyl reflected the vanatlon. In dual culture technique
m1nimum rad1al growth and maximum inh1bit1on per cent was observed
in Trichoderma Vlfide, Pseudomonas fluorescens and Bacillus subtifls.
Antagonistic effect of pre inoculated non pathogenic isolates
against highly pathogenic challenge inoculants resulted in,
considerable reduction in wilt Pre inoculation of non pathogenic FS-38
wi th FS-18 {HPI) resulted in reduction of wilt Similar trend was noticed
in FS-28 HPI when pre inoculated w1th FS-4 NPI and when it was pre
inoculated with Trichoderma viride
Inoculum density of 186.33 to 204.66 X 106 cfu/g soil exhibited
70.00 to 86.66% wlltmg under sick so1l condition with virulent isolate of
FS-18 and FS-28.
Among the chemicals, carbendazim 0.1 % and thiophanate
methyl while among the bioagents T. vlfide and Pseudomonas
fluorescens lower down the wilt incidence to the extent of 12.51 -
14 .01 %and 19.35- 19.88 % from the wilt mcidence of 35.70% with
maximum red wet chilli production. D1fferent delivery system i.e. seed
treatment. root dipping before planting and drenching proved to be
eff1c1ent in management of ch1lli w1lt on the bas1s of two seasons
experimentation.
None of the genotypes had showed immune reactions while one
genotype Agnirekha has shown resistant reaction, whereas eight
genotypes showed moderately resistant reaction
The varied electrophoretiC banding pattern of protein and
isozymes viz. perox1dase, polyphenot OXIdase and esterase was
observed among the isolates of F sofani. Further studies will be
requ1red to standardize the spec1f1c characteristics of F. so/ani for
ascertaining the diversity."
 
Date 2018-10-17T10:36:56Z
2018-10-17T10:36:56Z
2012
 
Type Thesis
 
Identifier "PATIL MOHANKUMAR JAIKRISHNA(2012), INVESTIGATIONS ON FUSARIUM SOLAN/ CAUSING CHILLI WILT, DEPARTMENT OF PLANT PATHOLOGY, POST GRADUATE INSTITUTE, AKOLA, Dr. PANJABRAO DESHMUKH KRISHI VIDYAPEETH, KRISHINAGAR PO, AKOLA, Phd 2012, 195p"
http://krishikosh.egranth.ac.in/handle/1/5810081709
 
Language en
 
Format application/pdf
 
Publisher Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akol, Maharashtra.