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Integrated Management of Sugarcane Woolly APHID, Ceratovacuna lanigera Zehntner

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Title Integrated Management of Sugarcane Woolly APHID, Ceratovacuna lanigera Zehntner
 
Creator Basavaraj
 
Contributor K.A.Kulkarni
 
Subject Agricultural Entamology
 
Description A detailed study on integrated management of Sugarcane Woolly Aphid
(SWA) was undertaken at MARS, UAS, Dharwad and KIAAR, Sameerwadi during 2004-
2005.
Two granular insecticides at three different dosages viz., phorate 10 G @ 2.00, 2.50
and 3.00 kg a.i./ha, carbofuran 3 G @ 0.75, 0.90 and 1.05 kg a.i./ha and one spray
formulation chlorpyriphos 20 EC @ 0.04 per cent were tested against SWA under field
condition. All the tested insecticides were effective against SWA. However, chlorpyriphos
lost its efficacy earlier than all dosages of phorate and carbofuran. The lower doses of phorate
(2.0 kg a.i./ha) and carbofuran (0.75 kg a.i./ha) lost their efficacy earlier than their respective
higher dosages. However, phorate @ 2.50, 3.00 kg a.i./ha and carbofuran @ 0.90, 1.05 kg
a.i./ha retained their efficacy upto 28 days of application. Economics of granular insecticides
revealed that phorate @ 2.5 kg a.i./ha recorded highest additional profit (Rs. 21,400/ha) and
highest incremental benefit cost ratio (7.38).
Studies on the effect of insecticides on the predator of SWA Dipha aphidivora revealed
that dichlorvos @ 0.076% proved highly toxic. Chlorpyriphos @ 0.04%, monocrotophos @
0.036%, dimethoate @ 0.051 % and acephate @ 0.075% were found toxic. Whereas,
endosulfan @ 0.07%, imidacloprid @ 0.05% and thiamethoxam @ 0.012%were relatively
less toxic or safe to eggs, fourth instar larvae (under web condition) and cocoons of D.
aphidivora under laboratory conditions.
Biopesticide Photorhabdus luminescens found pathogenic to SWA in laboratory
condition. Further, field evaluation of biopesticide on SWA showed that higher dose of P.
luminescens (8 ml/l) caused only 34.03 per cent mortality of the aphid. Hence, P. luminescens
has limited scope under field condition against SWA.
The laboratory studies confirmed the parasitisation of D. aphidivora egg by
Trichogramma parasitoid. Parasitoid completed its development and successfully emerged
from the parasitised eggs. Among five species evaluated, T. dendrolini recorded lowest
parasitisation (31.33%) and lowest adult emergence (38.33%). Whereas, T. chilonis
(Dharwad strain) recorded highest parasitisation (47.33%) and highest adult emergence
(52.05%).
Studies on development and testing of Integrated Pest Management (IPM) modules against
SWA revealed that, among the three modules developed and tested module II, which
comprising of sett treatment with malathion 50 EC @ 2 ml/l, Paired row planting (60 x 120
cm), application of fertilizer @ 250:75:185 kg N:P:K/ha, soil application of granular
insecticide phorate 10 G @ 25 kg/ha at 150 days after planting and release of predator D.
aphidivora @ 1000 cocoons/ha at240 days after planting found to be economically viable,
ecofriendly and amenable IPM module in combating the SWA menace.
 
Date 2016-09-14T10:20:44Z
2016-09-14T10:20:44Z
2005
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76562
 
Format application/pdf
 
Publisher UAS, Dharwad