volume 20 issue 2 (june 2000) : 118-119
ACTMTY OF COCCINEWD PREDATOR AND ITS HYPERPARASITOID IN RABI SORGHUM ECOSYSTEM OF NORTHERN KARNATAKA
1University of Agricultural Sciences, Dharwad
Regional Research Station, Bljapur-586 101, India
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Agricultural Science Digest
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volume 20 issue 2 (june 2000) : 118-119
ACTMTY OF COCCINEWD PREDATOR AND ITS HYPERPARASITOID IN RABI SORGHUM ECOSYSTEM OF NORTHERN KARNATAKA
1University of Agricultural Sciences, Dharwad
Regional Research Station, Bljapur-586 101, India
ABSTRACT
Studies on the abundance of coccinellid predator, Coccine//a septempunctatll Linnaeus
(grubs and adults) and the parasitization of their grubs and pupae by an eulophid
hyperparasitoid, Tetrastichus cocclne//ae Kurz. were carried out during rabi 1989-90 and
1990-91 in the sorghum ecosystem of Northern Karnataka. The results revealed peak activity
of the adults and grubs ofpredatory coccineUid between 2nd and 3rd standard week in January
and declined there after. The activity of the hyperparasitoid varied across years with modest
(9.2-10.0%) hyperparasltization of coccineUid grub during foUrth week of December (52od std
wk.). The eulopid parasitoid, T. cocclne//aeremained quite active during first and second
week of February (6th and 7th std. wk.). in 1990 and during fifth week of January (5th std. wk.)
in 1991 resulting in 100 and 37.6% parasitization of the grubs of C. septempunctllta. More
or less similar trend was exhibited by the hyperparasitiod in parasitizing pupae of the predatory
beetles
(grubs and adults) and the parasitization of their grubs and pupae by an eulophid
hyperparasitoid, Tetrastichus cocclne//ae Kurz. were carried out during rabi 1989-90 and
1990-91 in the sorghum ecosystem of Northern Karnataka. The results revealed peak activity
of the adults and grubs ofpredatory coccineUid between 2nd and 3rd standard week in January
and declined there after. The activity of the hyperparasitoid varied across years with modest
(9.2-10.0%) hyperparasltization of coccineUid grub during foUrth week of December (52od std
wk.). The eulopid parasitoid, T. cocclne//aeremained quite active during first and second
week of February (6th and 7th std. wk.). in 1990 and during fifth week of January (5th std. wk.)
in 1991 resulting in 100 and 37.6% parasitization of the grubs of C. septempunctllta. More
or less similar trend was exhibited by the hyperparasitiod in parasitizing pupae of the predatory
beetles
KEYWORDS
REFERENCES
- Balikal, R.A (1997). In : Plant Reslstilnce to Insects in Sorghum. (Eds. Sharma, H.C. et al.). ICRISAT. Patancheru. pp.60-64.
- Gautam, R.D. (1994). Ann.agrk. Res., 15: 71-75.
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In this Article
APC
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Submit your manuscript through user friendly platform and acquire the maximum impact for your research by publishing with ARCC Journals.
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Published In
Agricultural Science Digest