STATUS ON NATURAL PARASITIZATION OF RICE YELLOW STEM BORER, Scirpophaga incertulas IN BATHALAGODA REGION, SRI LANKA .

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dc.contributor.authorBANDARANAYAKE, M.A.B.R.P.
dc.date.accessioned2021-04-28T05:11:37Z
dc.date.available2021-04-28T05:11:37Z
dc.date.issued2017
dc.description.abstractThe Rice yellow stem borer is one of the major insect pests of rice crop in Sri Lanka. This study was conducted to determine the status on natural parasitization of Rice yellow stem borer, Scirpophaga incertulas prevailing at pesticide treated and untreated conditions. Egg masses and infested plants with white head symptoms were collected from the experimental sites, reared and kept until the emergence of larvae, pest adult or parasitoids. Parasitized egg masses and parasitized infested plants were counted and emerged parasitoids were identified with the aid of taxonomic key. Weather parameters were subjected to correlation analysis to check whether there is a relationship of the level of parasitization.Tetrustichus schoenobii was the recorded egg parasitoid. Poecilotraphera taeniata, Tetrustichus oyyari, Tropobracon schoenobil, and Cotesia flavipes were recorded as pupae/larvae parasitoids. Significantly high rate of egg and pupae/larvae parasitization was observed in pesticide untreated fields than the pesticide treated fields. Rainfall, maximum temperature, minimum temperature, humidity morning and evening, and sunshine hours did not show any correlation with parasitization during the Yala season of 2017. The egg and pupae/larvae parasitization of yellow stem borer occurred in Yala season 2017 in Bathalagoda region. Key words: Rice yellow stem borer, Parasitization, Parasitoidsen_US
dc.identifier.otherUWU/EAG/13/0004
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/6619/UWULD%20EAG%2013%200004-14052019153928.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;UWU/EAG/13/0004
dc.subjectExport Agriculture Degree Programme (EAG)en_US
dc.titleSTATUS ON NATURAL PARASITIZATION OF RICE YELLOW STEM BORER, Scirpophaga incertulas IN BATHALAGODA REGION, SRI LANKA .en_US
dc.title.alternativeResearch Article – EAG 2017en_US
dc.typeThesisen_US
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