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Investigation on Insect Pests of Sesame and their Management with Special Reference to Phyllody Vector

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Title Investigation on Insect Pests of Sesame and their Management with Special Reference to Phyllody Vector
 
Creator Rojeet Thangjan
 
Contributor A.S. Vastrad
 
Subject Agricultural Entomology
 
Description Roving survey was conducted in 6 districts of North Karnataka viz., Dharwad,
Belgaum, Gadag, Haveri, Bijapur and Bagalkot during Kharif -2011 at flowering and
pod maturation stage. The incidence of phyllody was 3.50% in Haveri while the
incidence of its vector, Orosius albicinctus was 0.98 per plant in Gadag district. A
total of 8 insect pests were recorded on sesame. Til halk moth, Acherontia styx
Westwood. was noticed in most of the area surveyed . Among the natural enemies,
spiders, Geocoris sp., Coccinella transversalis, Cheilomenes sexmaculata, Chrysopa
sp. and praying mantis were the general predators while Telenomus sp. and
Trichogramma sp. were the egg parasitoids of A. styx during flowering stage.
During fixed plot survey A. styx, S. obliqua, S. litura, Nesidocoris sp., N.
viridula, Dolycoris indicus, Dysdercus koenigii, Oxycarenus hyalipennis, Bemisia
tabaci, Cletus bipunctatus, Clavigralla gibbosa, Oxycetonia albopunctata,
Campylomma sp., Plautia crossata, Dortus sp., Myzus persicae and unidentified
mealybug were noticed. Their incidence was low in all dates of sowing. It was
observed that both the phyllody incidence and its vector O. albicinctus population was
higher when the crop was sown in the month of June.
The presence of phytoplasma both in plant and its vector, O. albicinctus was
confirmed through molecular means by using phytoplasma specific primer pair P1/P7
and R16F2n/R2.
Imidacloprid 600FS seed treatment followed by Imidacloprid 17.8 SL spray
was significantly superior in reducing the leafhopper population. However, B:C was
high in treatments Imidacloprid 600FS seed treatment followed by Lambda
cyhalothrin 5 EC spray.
The biochemical analysis of healthy and diseased plants revealed that diseased
samples contained higher total phenol, reducing sugar and protein contents compared
to healthy samples.
 
Date 2016-11-21T18:00:56Z
2016-11-21T18:00:56Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/86802
 
Format application/pdf
 
Publisher UAS, Dharwad