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STUDIES ON SEED-BORNE MYCOFLORA OF CHILLIES (Capsicum annuum L. }

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Title STUDIES ON SEED-BORNE MYCOFLORA OF CHILLIES (Capsicum annuum L. }
 
Creator RAJARAJESWARI, N V L
 
Contributor GOVINDA RAO, N
 
Subject STUDIES, SEED-BORNE, MYCOFLORA, CHILLIES
 
Description Standard blotter method was. followed for
isolation of seed mycoflora associated with seed samples
of Chilli yarieties collected from Malyal (LCA-206,~A-l~
LCA-229, LCA-410 and X-235) and Lam (LCA-206, _ LCA-248,
CA-960, X-235 and G-4). Seed samples of M·alyal carried
more number of fungi, more number of fungal colonies and
more percentage incidence of various fungi as compared
to the samples collected from Lam.
Component planting method was followed to
locate the seed-borne fungi in the different component
parts of seed of LCA-206 variety of chilli. Maximum
number of fungi were located on seed coat followed by
endosperm and embryo.
The effect of six predominant fungi
Astergillus flavus, A. 'nifer, Rhizopus stolonifer,
Co letotrichum dematium, Pen cillium sp. and Chaetomium sp. was studied on seed germination and shoot and root
development by rolled paper towel method.
Colletotrichum dematium followed by Rhizopus stolonifer,
Penicillium sp., Aspergillus flavus, Chastomium sp. and
A. niger adversely effected seed germination, shoot and
root growth and seedling vigour. Further Colletotrichum
dematium was found to be pathogenic on seedlings when
tested by test tube water agar method.
The effect of seed leachates of seven
varieties of chilli (LCA-206, LCA-229, LCA-248, CA-960,
X-235, G-3 and G-4) was assessed on spore germiriation of
six predominent fungi by slide germination technique.
Seed leachates of X-235 variety considerably reduced the
spore germination of all the fungi studied.
The effect of dry seed treatment with
different seed dressing fungicides (Thiram, Thiram +
Bavistin, Bavistin, Chlorothalanil. Dithane M-45 and
Captaf) was studied to control the seed borne fungal
infection in LCA-206 variety. Thiram + Bavistin (1:1) @
2 g/kg of seed was found to be most effective in
controlling the incidence of various seed-borne fungi
and thereby improving the seed germination, shoot and
root growth and seedling vigour.
The correlation between fruil nrea infection
and seed infection was studied in infected pods of
different chilli varieties collected from Malyal and Lam
positive correlation with respect to the total number of
fungal colonies on seed with fruit infection was
obscrued in all the varieties from Malyal. No
correlation was found with respect to number of fungi in
samples of Malyal collected samples and also between
total number of fungal colonies and fruit .infection in
Lam collected samples. Negative correlation was found
in respect of number of fungi and fruit infection in Lam
collected samples.
 
Date 2016-08-19T14:37:02Z
2016-08-19T14:37:02Z
1991
 
Type Thesis
 
Identifier ACHARYA N.G.AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD - 500 030
http://krishikosh.egranth.ac.in/handle/1/73047
 
Language en
 
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