EVALUATION OF ENTOMOPATHOGENIC FUNGAL ISOLATES FOR THE MANAGEMENT OF CHILLI THRIPS, Scirtothrips dorsalis Hood (THRIPIDAE: THYSANOPTERA)

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dc.contributor.advisorVENKATESHALU
dc.contributor.advisorS. H. RAMANAGOUDA
dc.contributor.advisorD. L. RUDRESH
dc.contributor.advisorG. MANJUNATH
dc.contributor.advisorRAUT, NAMITA.
dc.contributor.authorC. V. SHARAN
dc.date.accessioned2024-05-14T11:13:32Z
dc.date.available2024-05-14T11:13:32Z
dc.date.issued2021-12
dc.description.abstractThe present investigation on evaluation of entomopathogenic fungal isolates for the management of chilli thrips, Scirtothrips dorsalis Hood (Thripidae: Thysanoptera) was carried out at Department of Entomology, College of Horticulture, University of Horticultural Sciences, Bagalkote, India during 2020-21. In the first part of the study, the bioefficacy of eight local isolates of entomopathogenic fungi (EPF) against chilli thrips was evaluated under semi-field conditions. The results indicated that, among the different isolates Beauveria bassiana (BbM) was significantly superior in reducing thrips population and LCI due to thrips, followed by Lecanicillium lecanii (LlA2), L. lecanii (LlM) and Fusarium semitectum (FsB3). Therefore, these four isolates were selected for the field evaluation in the second part of the study. Under field conditions, all the EPF’s tested were found to be effective in suppressing the thrips population as judged from the mean thrips population, LCI due to thrips and per cent reduction over untreated control. Significantly lowest thrips population, LCI for thrips and highest reduction over control was noticed in the plots treated with the local isolate BbM @ 2 g/l (2.03 thrips/3 leaves, 0.80 and 52.12 %, respectively) followed by LlA2 @ 2 g/l (2.22 thrips/3 leaves, 0.80 and 48.69 %, respectively). Further, highest green chilli yield and B:C ratio were also recorded in the plots treated with BbM (18.12 t/ha and 1.97, respectively) followed by LlA2 (18.00 t/ha and 1.95, respectively) and commercial strain of B. bassiana BbC (16.67 t/ha and 1.81, respectively) which were statistically on par with the botanical azadirachtin 10000 ppm (17.89 t/ha and 1.93, respectively). Relatively higher thermotolerance and the better host specific interactions might have attributed to comparatively superior performance of these local isolates than the other EPF’s. Therefore, local isolates of EPF’s can be considered as promissive alternative to chemical insecticides and could be effectively incorporated in the ecofriendly management of chilli thrips.
dc.identifier.otherUHS15PGM596
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810208946
dc.keywordsHorticulture
dc.keywordsEntomology
dc.keywordsEntomopathogenic
dc.keywordsFungal
dc.keywordsIsolates
dc.keywordsChilli Thrips
dc.keywordsScirtothrips Dorsalis
dc.keywordsHood
dc.keywordsThripidae
dc.keywordsThysanoptera
dc.keywordsBioefficacy
dc.keywordsFungi
dc.keywordsBeauveria Bassiana
dc.keywordsLecanicillium Lecanii
dc.keywordsFusarium Semitectum
dc.keywordsBotanical
dc.keywordsAzadirachtin
dc.keywordsThermotolerance
dc.keywordsInsecticides
dc.keywordsChemical
dc.keywordsEcofriendly
dc.keywordsUHS15PGM596
dc.keywordsT876
dc.language.isoEnglish
dc.pages97p. (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.themeEVALUATION OF ENTOMOPATHOGENIC FUNGAL ISOLATES FOR THE MANAGEMENT OF CHILLI THRIPS, Scirtothrips dorsalis Hood (THRIPIDAE: THYSANOPTERA)
dc.these.typeM.Sc
dc.titleEVALUATION OF ENTOMOPATHOGENIC FUNGAL ISOLATES FOR THE MANAGEMENT OF CHILLI THRIPS, Scirtothrips dorsalis Hood (THRIPIDAE: THYSANOPTERA)
dc.typeThesis
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