DEVELOPMENT OF INTEGRATED PEST MANAGEMENT STRATEGIES AGAINST MAJOR INSECT PESTS OF SUNFLOWER (Hetianthus annuusUHW.)
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Date
2008-09-19
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University of Agricultural Sciences GKVK, Banglore
Abstract
Investigations on the development of Integrated Pest Management strategies against major insect
pests of sunflower were undertaken during 1996 to 1998 and 2001 to 2005 at Zonal Agricultural
Research Station (ZARS), University of Agricultural Sciences, GKVK, Bangalore and ZARS,
Vishveswaraiah Canal Farm, Mandya, respectively. Among the Integrated Pest Management (IPM)
components evaluated under field conditions, one border row of castor along with sunflower recorded
significantly lower population of Spodoptera titura. The application of Bacillus thuringiensis var
kurtsaki @ 1.0 kg/ha at 35,50 and 65 DAS in comparison with endosulfan 35 EC indicated significant
reduction in larval population of Thysanoplusia orichalcea. Similarly, the Combination of SI NPV @
250 LE/ha + B.t.k. @ 1.0 kg/ha applied at 50 and 65 DAS was found to be highly effective in
suppression of S. litura and Helicoverpa armigera. Similarly the combination of Ha NPV @ 250 LE/ha
+ B.t.k. @ 1.0 kg/ha + release of Chrysoperia carnea @ 20,000/ha was proved to be superior over
endosulfan 35 EC in reducing H. armigera and T. orichalcea. Among the conventional insecticides
evaluated, methomyl 12.5 L spray @ 187 g. a.i./ha recorded significantly lower damage with higher
yield followed by endosulfan 35 EC @ 525 g.a.i./ha, monocrotophos 36 EC and NSKE 5 per cent.
Among the newer insecticides tested, seed treatment with imidacloprid 70 WS recorded significantly
lower population of leafhopper {Amrasca biguttula biguttula) and thrips {Thrips palmi) up to 30 days
of sowing. Further it was also proved to be effective in reducing sunflower necrosis disease (SND).
Subsequently, spinosad 45 SC @ 75 g.a.i./ha and indoxacarb 14.5 SC @ 75 g.a.i./ha spray were
proved to be effective in reducing larval populations of S. litura, H. armigera and T. orichalcea. Of the
Three IPM modules developed and evaluated in comparison with the Recommended Package of
Practices (RPP) for plant protection against major insect pests of sunflower, bio-intensive module
(Seed treatment with imidacloprid 70 WS at 5 g/kg seeds; NSKE 5%; spinosad 45 SC; Ha NPV;
B.tk.) and adaptive module (one border row castor as trap crop; seed treatment with imidacloprid 70
WS; NSKE 5%; indoxacarb14.5 SC]B.t..k.] spinosad 45 SC) were proved to be superior in reducing
pest population with higher net returns than the RPP. With regards to the economics of different
modules evaluated, the maximum net profit was realized from the adaptiy^joq^ule followed by bio-
Intensive module compared to Recommended Package of Practices.
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