ESTIMATION OF CROP LOSS, DETERMINATION OF ECONOMIC INJORY LEVEL AND MANAGEMENT OF CAPSULE BORERS, Helicoverpaannigera{}Mm%x) AND HeliotMspeltlgera{%Xim) IN SAFFLOWER
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Date
2007-08-29
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University of Agricultural Sciences GKVK, Banglore
Abstract
Incidence of capsule borers in four districts of northern Karnataka revealed that
the pest was present in all the four districts and the capsule damage varied from 26.92 to
37.90 per cent. More than 31 per cent capsule damage was observed in Dharwad and
Gadag districts; while it was less than 28 per cent in Belgaum and Haveri districts. In
different cropping systems, minimum capsule damage (20.00%) was noticed on safflower
when intercropped with jowar, whereas it was maximum (40.20%) when intercropped with
chickpea. Highest mean number of capsule borers (H. armigera and H. peltigera) (4.75),
Spodoptera litura (Hub.) (0.70), Perigia capensis (Walkar
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