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Sucking pests of sunflower with special reference to thrips palmi karny, its relation with necrosis virus and management

KrishiKosh

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Title Sucking pests of sunflower with special reference to thrips palmi karny, its relation with necrosis virus and management
 
Creator Pramod Katti
 
Contributor A.Naganagoud
 
Subject Agricultural Entamology
 
Description Investigation on sucking pests of sunflower with special reference to Thrips palmi
karny, its relation with necrosis virus and management was carried out at RARS, Raichur,
Karnataka, India during 2005-07. The seasonal incidence studies indicated the prevalence of
high population of leafhoppers in the Rabi, thrips in kharif and higher incidence of necrosis
virus in kharif. Studies on leafhoppers indicated significant and negative correlation with
maximum temperature, minimum temperature and wind. Thrips were significantly and
positively correlated with maximum temperature. Necrosis virus incidence indicated
significant and positive correlation with minimum temperature, rainfall, morning and evening
relative humidity, wind speed and cloud coverage. The relationship between thrips and
necrosis virus was positive.
Leafhopper and whitefly were not involved in transmission of necrosis virus.
Whereas, T.palmi was able to acquire and transmit the virus. Out of 36 weed hosts observed
for necrosis 13 were found positive to DAC-ELISA test.
The management of sucking pests and necrosis studies revealed that, the treatment
comprising of RDF (100%) + RPP was superior followed by treatment with vermicompost
(2.5 t ha-1) + RDF (50%) + GCK (1%) + vermiwash for leafhoppers, thrips and necrosis
disease with higher yields. In another experiment, Treatment comprising of oxydemeton
methyl @ 1.5 ml/l spray recorded lowest thrips population and lesser necrosis followed by
treatment with sorghum leaf extract (10%) + imidacloprid 17.8 SL @ 0.25 ml/ l spray.
Module-I comprising of growing sorghum along border (four rows) sown before 15
days of main crop followed by seed treatment with imidacloprid 70 WS @ 5 g/ kg of seed
and application of vermicompost (2.5 t ha-1) + 50% RDF and application of two sprays of
neem formulation was best IPM module in managing sucking pests and necrosis virus
disease.
 
Date 2016-07-22T15:16:41Z
2016-07-22T15:16:41Z
2007
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69380
 
Format application/pdf
 
Publisher UAS Dharwad