Indian Journal of Agricultural Research

  • Chief EditorV. Geethalakshmi

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Indian Journal of Agricultural Research, volume 44 issue 4 (december 2010) : 281 - 287

BIOLOGICAL CONTROL POTENTIAL EVALUATION OF RHYNOCORIS KUMARII AMBROSE AND LIVINGSTONE (HEMIPTERA : REDUVIIDAE) ON APHIS CRACCIVORA (KOCH.) (HEMIPTERA: APHIDIDAE)

K. Sahayaraj*, A. Asha
1Crop Protection Research Center, Department of Advanced Zoology and Biotechnology, St. Xavier’s College (Autonomous), Palayamkottai- 627 002,India

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Cite article:- Sahayaraj* K., Asha A. (2024). BIOLOGICAL CONTROL POTENTIAL EVALUATION OF RHYNOCORIS KUMARII AMBROSE AND LIVINGSTONE (HEMIPTERA : REDUVIIDAE) ON APHIS CRACCIVORA (KOCH.) (HEMIPTERA: APHIDIDAE). Indian Journal of Agricultural Research. 44(4): 281 - 287. doi: .

ABSTRACT

A laboratory experiment was conducted to evaluate the biological control potential of first,
second, third and fourth nymphal instars of Rhynocoris kumarii Ambrose and Livingston on
different densities of Aphis craccivora Koch. by estimating the exhibited functional response.
Results revealed that R. kumarii responded positively to the increasing aphid density and exhibited
Holling’s type II functional response. Similarly, the searching time also decreased when prey
density was increased. However, the searching time of the first instar reduviid was prey density
dependent factor. Both fifth instar and adult R. kumarii did not approach aphids. Among the
four nymphal instars tested, fourth instar had higher predatory potential than other instars. R.
kumarii fourth instar nymphs can be used to control aphids in groundnut ecosystem in 1:75.0
ratios.

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