METHYL JASMONATE INDUCED RESISTANCE AGAINST Tetranychus urticae Koch IN GRAPES CV. THOMPSON SEEDLESS

Simple item page
dc.contributor.advisorNADAF, A. M.
dc.contributor.advisorB. VENKATESHALU
dc.contributor.advisorPEERAJADE, D. A.
dc.contributor.advisorG. MANJUNATH
dc.contributor.advisorS. RAGHAVENDRA
dc.contributor.authorPUSHPALATHA
dc.date.accessioned2024-05-13T11:16:45Z
dc.date.available2024-05-13T11:16:45Z
dc.date.issued2021-08
dc.description.abstractAn investigation on Methyl jasmonate (MeJA) induced resistance against Tetranychus urticae in grapes cv. Thompson seedless was carried out at Horticulture Research and Extension Centre, Vijayapura (Tidagundi) during the year 2020-21 (forward pruning). The bio-efficacy of MeJA against T.urticae in cv. Thompson Seedless revealed that the, two sprays of abamectin 1.9 EC @ 0.3ml/l and MeJA + Azadirachtin 10000 ppm at 1mM + 2ml/l found to be superior in suppressing the eggs and mites population. Further, abamectin 1.9 EC @ 0.3ml/l and MeJA + Azadirachtin 10000 ppm at 1mM + 2ml/l has recorded highest yield (17.86 and 17.37 t/ha, respectively). Whereas, highest B:C ratio was recorded in abamectin 1.9 EC @ 0.3ml/l (4.05) followed by moderate B:C ratio in MeJA + Azadirachtin 10000 ppm at 1mM + 2ml/l (1.52). The maximum total soluble solids (TSS) was recorded in MeJA + Azadirachtin 10000 ppm at 1mM + 2ml/l (23.23 ˚B). The results obtained from biochemical analysis of the grape plants which received different MeJA treatments against T.urticae revealed that the foliar application of MeJA + Azadirachtin 10000 ppm at 1mM + 2ml/l, MeJA + Azadirachtin 10000 ppm at 0.75mM + 2ml/l and MeJA + Azadirachtin 10000 ppm at 0.5mM + 2ml/l found to enhance the resistance in grape plants as it was indicated higher amount of phenols as against other treatments. The correlation studies revealed that there was a positive correlation between the population of mites and analysed biochemical parameters like total sugars and reducing sugars whereas, phenols showed significant negative correlation with population of mites. Treatment, MeJA + Azadirachtin 10000 ppm at 1mM + 2ml/l has recorded the longest egg, larval, prototonymphal and deutonymphal period of development of mites. The biochemical analysis in seedlings of grapevine after mite infestation and treated with MeJA resulted that, the higher amount of phenols was recorded in MeJA + Azadirachtin 10000 ppm at 1mM + 2ml/l. MeJA can be used to manage the mites in grapes effectively, however higher market price of MeJA reduces the net profit. So, further studies were needed with this aspect.
dc.identifier.otherUHS17PGM884
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810208914
dc.keywordsHorticulture
dc.keywordsEntomology
dc.keywordsMethyl Jasmonate
dc.keywordsTetranychus Urticae
dc.keywordsGrapes
dc.keywordsThompson Seedless
dc.keywordsBio-efficacy
dc.keywordsMeJA
dc.keywordsAbamectin
dc.keywordsAzadirachtin
dc.keywordsSoluble Solids
dc.keywordsBiochemical
dc.keywordsPhenols
dc.keywordsParameters
dc.keywordsMites
dc.keywordsLarval
dc.keywordsPrototonymphal
dc.keywordsDeutonymphal
dc.keywordsGrapevine
dc.keywordsInfestation
dc.keywordsUHS17PGM884
dc.keywordsT878
dc.language.isoEnglish
dc.pages134p. (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.subEntomology
dc.themeMETHYL JASMONATE INDUCED RESISTANCE AGAINST Tetranychus urticae Koch IN GRAPES CV. THOMPSON SEEDLESS
dc.these.typeM.Sc
dc.titleMETHYL JASMONATE INDUCED RESISTANCE AGAINST Tetranychus urticae Koch IN GRAPES CV. THOMPSON SEEDLESS
dc.typeThesis
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
PUSHPALATHA UHS17PGM884.pdf
Size:
3.88 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