Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810041868
Authors: SYED MUZAMMIL
Advisor: Dr. A.P. BIRADAR
Title: MANAGEMENT OF SUNFLOWER DEFOLIATORS IN NORTHERN DRY ZONE OF KARNATAKA
Publisher: University of Agricultural Sciences, Dharwad
Language: en
Type: Thesis
Agrotags: null
Keywords: MANAGEMENT OF SUNFLOWER DEFOLIATORS IN NORTHERN DRY ZONE OF KARNATAKA
Abstract: Investigations on management of sunflower defoliators in Northern dry zone of Karnatakawere carried out during 2014-15 atRegional Agricultural Research Station(RARS), College of Agriculture, Vijayapur. Thestudies indicated that, defoliatorinsect pest population like Spodoptera litura, Thysanoplusia orichalcea and Spilarctia obliquawere very low during seedling stage and gradually increased during vegetative stage and reached a peak occurrence during reproductive stageof the crop. Natural enemies like coccinellids and spiderswere noticed in maximum numbersat reproductive stage of the crop. Sowing of sunflower during second fortnight of August and first fortnight of September was recorded minimum incidence of defoliators and per cent foliage damage. The incidence of coccinellids and spiders is closely related to the incidence of pests. The highest yield was recorded during first fortnight of September (12.95 q/ha) followed by second fortnight August (12.05 q/ha). Chlorantraniliprole (rynaxypyr 18.5 SC)and emamectin benzoate 5 SG found effective in managing bothS. obliqua and T. orichalcea byrecording least larval population and per cent foliage damage(11.33 and 12.00 %, respectively).Among the biorationals, GCK (Garlic-Chilly-Kerosene) extract 2%recorded least larval population and per cent foliage damage (20.08 %)was on par with NSKE 5% andP. juliflora aqueous solution 1% was 21.33 and 22.00 per cent, respectively were significantly superior over the other botanicals.The maximumpopulations of coccinellids and spiders were noticed in emamectin benzoate 5 SG and spinosad 45 SC treatments. Among the biorationals NSKE (Neem seed kernel extract) 5% recorded highest population coccinellids and spiders which were significantly superior over the other botanicals.Higher yield (17.26 and 16.67 q/ha, respectively) and benefit cost ratio of 1:3 were recorded inchlorantraniliprole (rynaxypyr 18.5 SC) and emamectin benzoate 5 SG treatments.
Subject: Agricultural Entomology
Theme: MANAGEMENT OF SUNFLOWER DEFOLIATORS IN NORTHERN DRY ZONE OF KARNATAKA
These Type: M.Sc
Issue Date: 2015-06
Appears in Collections:Thesis

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