SURVEY AND MANAGEMENT OF THRIPS TABACI (LINDEMAN) AND SPODOPTERA SPP. ON ONION CROP IN HYDERABAD-KARNATAKA REGION

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dc.contributor.advisorSUSHILA NADAGOUDA, A. NAGANAGOUD, A.G. SREENIVAS
dc.contributor.authorSURESH GOVINDRAO
dc.date.accessioned2019-12-20T07:26:49Z
dc.date.available2019-12-20T07:26:49Z
dc.date.issued2013-08-30
dc.description.abstractInvestigations on the survey, dates of transplanting and management of insect pests of onion using chemicals were undertaken at the Main Agricultural Research Station, University of Agricultural Sciences, Raichur during kharif 2012-13. The maximum population of 26.11 thrips per plant was recorded in Bellary and minimum population at Raichur (18.38 thrips/plant) district. The highest incidence of defoliators were noticed in Bellary district 4.20 defoliators per plant. In Raichur district minimum incidence of 2.35 per plant were recorded. The spiders and coccinellids population ranged from 0.10 to 0.80 per plant respectively. The peak activity of T. tabaci on onion was noticed from July 15th onwards which recording highest population of 21.59 thrips per plant and minimum population during October 15th (13.37 thrips/plant) which were found to be optimum dates of transplanting. Whereas, highest incidence of defoliators was noticed in August 30th (0.81 defoliators/plant) and minimum incidence (0.31 defoliators/plant) was registered on October 15th dates of transplanting. Maximum natural enemies population viz., spiders and coccinellids were noticed during September and October. Seed treatment with imidacloprid 60 FS @ 9 ml/kg of seed followed by two sprays with thiamethoxam 25 WG @ 0.2 g/l and fipronil 5 SC @ 1 ml/l for thrips and one spray of chlorantraniliprole 18.5 SC @ 0.15 ml/l for defoliators and T6 (no seed treatment, one spray in nursery with imidacloprid 17.8 SL @ 0.3 ml/l and two sprays with fipronil 5 SC @ 1 ml/l and thiamethoxam @ 0.2 g/l and one sprays with chlorantraniliprole 18.5 SC @ 0.15 ml/l) afforded good control of thrips upto fifteen days after spraying and were superior to all other treatments and also were found to be effective in reducing the defoliators. Highest yield of (24.4 and 23.8 t/ha).en_US
dc.identifier.citation150en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810138128
dc.language.isoenen_US
dc.pages120en_US
dc.publisherUNIVERSITY OF AGRICULTURAL SCIENCES RAICHURen_US
dc.research.problemSURVEY AND MANAGEMENT OF THRIPS TABACI (LINDEMAN) AND SPODOPTERA SPP. ON ONION CROP IN HYDERABAD-KARNATAKA REGIONen_US
dc.subEntomologyen_US
dc.subjectnullen_US
dc.themeSURVEY AND MANAGEMENT OF THRIPS TABACI (LINDEMAN) AND SPODOPTERA SPP. ON ONION CROP IN HYDERABAD-KARNATAKA REGIONen_US
dc.these.typeM.Scen_US
dc.titleSURVEY AND MANAGEMENT OF THRIPS TABACI (LINDEMAN) AND SPODOPTERA SPP. ON ONION CROP IN HYDERABAD-KARNATAKA REGIONen_US
dc.typeThesisen_US
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