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Life table studies and management of diamondback moth, plutella xylostella l. through organic approach in cabbage

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Title Life table studies and management of diamondback moth, plutella xylostella l. through organic approach in cabbage
 
Creator H.M.Shaila
 
Contributor J.S.Awaknavar
 
Subject Agricultural Entamology
 
Description Investigations on the topic were undertaken during 2005 to 2007 at University of
Agricultural Sciences, Dharwad and Garag village. Eight life tables of Plutella xylostella
have been constructed for the first time in Dharwad region (four generations in rainy season
and four in cold season). Only two important parasitoids were recorded on P. xylostella viz.,
the larval parasitoid, Cotesia plutellae and the larval-pupal parasitoid Tetrastichus
sokolowskii which caused 18-44 per cent and 4-48 per cent parasitization of larval period 2
and pupae, respectively. These were the major key mortality factors. The incidence of C.
plutellae was more in rainy season while, in winter season, T. sokolowskii was predominant.
Soil application of neem cake @ 500 kg/ha followed by sprays of vermiwash, garlic
chilli kerosene extract + cow urine, NSKE 5 per cent and Neemazol at 10 days interval was
comparable to the standard check, 100 per cent RDF+RPP in reducing the pest population
and recording high yield.
Among different insecticides tested, spinosad (2.5 SC) @ 15 g a.i./ha, emamectin
benzoate (5 SG) @ 7.5 g a.i/ha, indoxacarb (14.5 SC) @ 35 g a.i/ha proved significantly
superior in reducing the larval population of P. xylostella, Spodoptera litura and
Crocidolomia binotalis through out the crop period. Spinsoad proved to be highly cost
effective (IBCR 13.71). Among the tested chemicals dipel, novaluron, spinosad and
emamectin benzoate in the mentioned order were found to be safe to the parasitoid.
Among IPM modules evaluated, Adoptable module comprising of mustard trap crop,
application of neem cake @ 500 kg/ha + 50 per cent RDF super imposed with sprays of Bt,
spinosad and emamectin benzoate offered good protection against the defoliators and proved
cost effective. This was followed by IIHR module. All IPM modules supported good activity
of the parasitoid in the crop ecosystem compared to RPP.
 
Date 2016-07-22T14:40:44Z
2016-07-22T14:40:44Z
2007
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69348
 
Format application/pdf
 
Publisher UAS Dharwad