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Investigations on pest complex of medicinal plants and their management with special reference to Ashwagandha, Withania somnifera (Linn.)

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Title Investigations on pest complex of medicinal plants and their management with special reference to Ashwagandha, Withania somnifera (Linn.)
 
Creator D.Ramanna
 
Contributor Prasadkumar
 
Subject Agricultural Entomology
 
Description Results of roving survey on pests of Ashwagandha in four districts (Belgaum,
Dharwad, Gadag and Koppal) covering four villages carried out during 2008-09 revealed that
the occurrence of 11 species of pests in Arabhavi, eight species of pests in Dharwad, 10
species of pests both in Hulkoti and Yelburga. A total of five insect species were recorded on
Coleus, two pests on Solanum viarum, three pests on Amruthaballi and two insect species on
Shathavari.
During survey, four natural enemies were encountered on pests of Ashwagandha.
Among these, two species belong to Coleoptera, one species to Neuroptera and spiders as
general predators.
Fixed plot survey conducted at KRCCH, Arabhavi to know the seasonal incidence of
major pests of Ashwagandha revealed that the peak incidence of fruit borer damage (43.98%)
was noticed in the first fortnight of September 2008. The correlation studies on fruit borer
damage with weather parameters were significant to maximum temperature (negative) and
evening relative humidity (positive) while, non-significant to minimum temperature, morning
relative humidity and rainfall. Other major pests like aphids and mites were observed during
second fortnight of February 2009 (26.46 aphids/leaf) and second fortnight of December
2008 (30.55 mites/leaf) respectively.
Among organic insecticides evaluated tested, Nimbecidine (3ml/l) and NSKE (5%)
have proved effective against fruit borer on Ashwagandha. The analysis of yield and net
return of various organic insecticides have indicated that Nimbecidine (3ml/l) and NSKE
(5%) recorded higher root and seed yield as well as maximum net returns. Verticillium lecanii
(2g/l) and GCKE (5%) were found effective in controlling the aphid incidence on
Ashwagandha. Verticillium lecanii (2g/l) and Neem oil (5ml/l) were found effective in
reducing the mite population.
 
Date 2016-11-02T16:08:48Z
2016-11-02T16:08:48Z
2009
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/83452
 
Format application/pdf
 
Publisher UAS, Dharwad