Entomologia Croatica, Vol. 7 No. 1-2, 2003.
Original scientific paper
SIDE EFFECTS OF SELECTED BIOPESTICIDES ON REDUVIID PREDATOR Rhynocoris marginatus (FABRICIUS)
Kitherian Sahayaraj
; Crop Protection Research Centre, Tamil Nadu, India
Jasmine Abitha
; Crop Protection Research Centre, Tamil Nadu, India
Pratchas Selvaraj
; Crop Protection Research Centre, Tamil Nadu, India
Abstract
Laboratory trial was conducted to investigate the impact of two neem – based insecticides (nimbicidine and vijayneem) and a viral pathogen S-NPV on the incubation period, egg hatching, nymphal development and survival and predatory potential of a reduviid predator Rhynocoris marginatus (Fabricius). No significant impact was observed on the incubation period; however, neem based biopesticides significantly reduce the egg hatching, prolong the nymphal development and reduce the nymphal survival rate. Studies further revealed that dermal toxicity had more side effects on this reduviid than the contact toxicity. Biopesticides S-NPV proved to have the maximum impact on R. marginatus. Field level evaluation may give more information about the impact of these biopesticides on this reduviid.
Keywords
Heteroptera; Reduviidae; reduviid predator; neem biopesticides; azadirachtin; viral pathogen S-NPV; incubation; egg hatching; nymphal development; nymphal mortality; India
Hrčak ID:
283846
URI
Publication date:
31.1.2004.
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