CHARACTERIZATION AND MANAGEMENT OF FRUIT ROT OF POMEGRANATE CAUSED BY Colletotrichum gloeosporioides AND Alternaria alternata

Simple item page
dc.contributor.advisorMESTA, R. K.
dc.contributor.advisorK. C. KIRAN KUMAR
dc.contributor.advisorJHALEGAR, M. D. JAMEEL.
dc.contributor.advisorTHOKE, SIDDANNA.
dc.contributor.authorVANDANA
dc.date.accessioned2023-11-07T12:36:13Z
dc.date.available2023-11-07T12:36:13Z
dc.date.issued2021-01
dc.description.abstractPomegranate is one of the important horticultural crops infected by several pathogens. Among them anthracnose and heart rot are the most severe post harvest diseases in pomegranate. Fruits with typical symptoms were collected to isolate pathogens associated with anthracnose and heart rot diseases. The causal agents of anthracnose and heart rot were confirmed as Colletotrichum. gleoesporioides and Alternaria alternata respectively through pathogenecity test, cultural, morphological and molecular identification. Among different media, oat meal agar (90.00 mm) was found to be the best solid culture media. Potato dextrose broth was found to be best liquid media for the growth of both the pathogens. Fungicides evaluated under in vitro against C. gleoesporioides and A. alternata revealed that mancozeb 75% WP, zineb 75% WP, tricyclazole 18 % + mancozeb 62 %, carbendazim 12% + mancozeb 63% and carboxin 37.5% + thiram 37.5% completely inhibited the growth of both the pathogens at 1000, 1500, 2000 and 3000 ppm. Propiconazole 25% EC, hexaconazole 5% EC, iprobenfos 48% EC and kresoxim methyl 44.3% EC at 250, 500 and 1000 and 2000 ppm completely inhibited the growth. Among bio agents Trichoderma harzianum, UAS, Dharwad isolate was most effective in inhibiting the mycelia growth of C. gloeosporioides and A. alternata with 86.67% and 87.78% respectively. Under field condition application of two sprays of propiconazole 25% EC @ 0.025% , mancozeb 75% WP @ 0.1% and carbendazim 12% + mancozeb 63% @ 0.1% showed least fruit rot PDI of 36.00%, 37.33% and 37.33% respectively. Post harvest management studies revealed that propiconazole 25% EC recorded least PDI (7.22%) followed by hexaconazole 5% EC (12.78%), NaOCl (4%) + CaCl2 (10%) (12.78%) and carboxin 37.5% + thiram 37.5% (13.89%). Least physiological weight loss was recorded in propiconazole 25% EC treated fruits (9.53%) followed by chitosan 1% (12.37%) and NaOCl (4%) + CaCl2 (10%) (12.67%) treated fruits. NaOCl (4%) + CaCl2 (10%) showed maximum firmness (45.42 N) followed by propiconazole 25% EC (45.23 N), kresoxim methyl 44.3% EC (44.28 N) and carboxin 37.5% + thiram 37.5% (44.25 N). NaOCl (4%) + CaCl2 (10%) and propiconazole 25% EC recorded least TSS content of 19.12 and 19.18 0B, respectively. Propiconazole 25% EC recorded highest mean titrable acidity (1.82%) followed by NaOCl (4%) + CaCl2 (10%) (1.63%) and zineb 75% WP (1.56%). The highest ascorbic acid retention was recorded in propiconazole 25% EC treated fruits (18.23 mg/100g) followed by hexaconazole 5% EC (17.55 mg/100g) and kresoxim methyl 44.3% EC (16.51 mg/100g). Among different post harvest treatments tested propiconazole 25% EC @ 250 ppm, hexaconazole 5% EC @ 250 ppm and NaOCl (4%) + CaCl2 (10%) application can reduce losses caused by fruit rots during storage of fruits at room temperature.
dc.identifier.otherUHS18PGM1061
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810200532
dc.keywordsHorticulture
dc.keywordsPathology
dc.keywordsPlant Pathology
dc.keywordsPomegranate
dc.keywordsPathogens
dc.keywordsAnthracnose
dc.keywordsFruit Rot
dc.keywordsHarvest
dc.keywordsHeart Rot
dc.keywordsColletotrichum
dc.keywordsGleoesporioides
dc.keywordsAlternaria Alternata
dc.keywordsPathogenecity
dc.keywordsMorphological
dc.keywordsMolecular
dc.keywordsDextrose Broth
dc.keywordsFungicides
dc.keywordsMancozeb
dc.keywordsZineb
dc.keywordsTricyclazole
dc.keywordsCarbendazim
dc.keywordsCarboxin
dc.keywordsThiram
dc.keywordsPropiconazole
dc.keywordsHexaconazole
dc.keywordsIprobenfos
dc.keywordsKresoxim Methyl
dc.keywordsTrichoderma Harzianum
dc.keywordsMycelia
dc.keywordsChitosan
dc.keywordsUHS18PGM1061
dc.keywordsT673
dc.language.isoEnglish
dc.pages166p. (Due to pdf. conversion there is a difference in pages of soft copy and hard copy).
dc.publisherUniversity of Horticultural Sciences, Bagalkot. (College of Horticulture, Bagalkot).
dc.subPlant Pathology
dc.themeCHARACTERIZATION AND MANAGEMENT OF FRUIT ROT OF POMEGRANATE CAUSED BY Colletotrichum gloeosporioides AND Alternaria alternata
dc.these.typeM.Sc
dc.titleCHARACTERIZATION AND MANAGEMENT OF FRUIT ROT OF POMEGRANATE CAUSED BY Colletotrichum gloeosporioides AND Alternaria alternata
dc.typeThesis
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
VANDANA UHS18PGM1061.pdf
Size:
6.73 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Theses