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COMPATIBILITY OF GRADED LEVELS OF FERTILIZERS WITH INSECTICIDES FOR MANAGEMENT OF INSECT PESTS OF RICE

KrishiKosh

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Title COMPATIBILITY OF GRADED LEVELS OF FERTILIZERS WITH INSECTICIDES FOR MANAGEMENT OF INSECT PESTS OF RICE
 
Creator Nayak, Susmita
 
Contributor Dash, D.
 
Subject --COMPATIBILITY OF GRADED, FERTILIZERS, INSECTICIDES, MANAGEMENT, INSECT PESTS, RICE-
 
Description Field studies conducted during kharif, 2013 at the Central Research Station, Orissa
University of Agriculture and Technology, Bhubaneswar to evaluate the efficacy of three
sprayable insecticides (triazophos, fipronil and carbosulfan) along with untreated control
against major insect pests of rice raised under three levels of NPK fertilizers (60:30:30,
90:45:45 and 120:60:60 kg/ha). The experiment was laid out in Factorial RBD with three
replications in plots of size 5m x 4m taking ‘Jaya’ as the test cultivar following the
recommended package of practices.
The effect of NPK fertilizers on incidence of insect pest in context with insecticidal
treatment revealed that higher NPK dose @ 120:60:60 kg/ha (F3) favoured the incidence of
insect pests as compared to lower dose of 60:30:30 kg NPK/ha (F1). Application of NPK dose
F1 had resulted in minimum incidence of YSB (4.78 % DH & 5.68 % WEH), GM (4.86 %
SS), hispa (3.71 % leaf damage), GLH (4.46/hill), LF (8.49 % infested leaves), BPH
(6.94/hill) and gundhi bug (2.41/m2). Moderate level of pest incidence was visualised in plots
fertilized with 90:45:45 kg NPK/ha (F2). It was observed that the population density of GM,
GLH, LF and gundhi bug in NPK level F2 remained on par with that of F1 dose. Though
higher NPK dose sheltered more number of gundhi bugs, the population in between F1 & F2
as well as F2 & F3 were on par indicating parallel population in all the NPK fertilizer levels.
Irrespective of fertilizer levels, foliar application of carbosulfan emerged as best
insecticide in suppressing the incidence of DH and WEH with (33.5 and 55.08 %) and GLH
(54.93 %) reduction over control. Sprayable fipronil was most effective in minimising the
incidence of GM, BPH and gundhi bugs with reduction of 47.37, 65.95 and 28.91 per cent
over the control, respectively. Triazophos treatment was superior against hispa and LF and
caused a reduction of 51.75 and 34.10 % in leaf infestation over the control, respectively.
The efficacy of insecticides in response to different levels of NPK fertilizers
highlighted that the plot fertilized with F1 NPK dose with carbosulfan treatment gave better
control of YSB (56.90 % and 69.20 % reduction of DH and WEH) and GLH (64.80 %
reduction) over control followed by NPK dose F2 under protection umbrella with reduction of
41.29 %, 62.90 % and 56.59 % in the incidence of DH, WEH and GLH population over the
control, respectively. The NPK fertilizer dose F1 coupled with fipronil application was found
promising against GM, BPH and gundhi bug with 61.04, 78.32 and 43.46 % reduction over
the control, respectively. The corresponding reduction in the incidence of GM, BPH and
gundhi bug over control was 57.20, 69.02 and 38.48 per cent, respectively in NPK fertilizer
dose F2 under same insecticidal protection. The percentage reduction in leaf damage due to
hispa and leaf folder over control (F3I0) was highest (64.42 and 48.64 %), when the crop
raised under NPK dose of F1 in combination with triazophos application. The NPK dose F2
with similar protection also provided appreciable control against both the pests with reduction
of 56.48 and 42.92 % over the control, respectively.
The NPK dose F3 without protection harboured almost equal number of spiders
(2.05/hill) with that of triazophos treatment (2.04/hill) indicating comparative safeness of the
insecticide to the predatory spiders.
Highest grain yield (4.46 t/ha) was obtained with the insecticidal protection of
carbosulfan and application of higher dose of NPK F3 with 39.01 % increase in yield over
control. However, cost benefit analysis revealed that application of NPK @ 90:45:45 kg/ha
and spraying of triazophos accrued maximum monetary benefit of Rs. 5.12/- for each one
rupee spent. The pest induced avoidable loss estimated on the basis of yield was minimum
(2.02 %) in F2I3 treatment.
 
Date 2017-01-04T14:52:28Z
2017-01-04T14:52:28Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/94484
 
Language en
 
Relation Th;4210
 
Format application/pdf