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Economic Injury Level for Sorghum Earhead Bug, Calocoris angustatus Lethierry in Southern India*

Published online by Cambridge University Press:  19 September 2011

N. Natarajan  and
P. C. Sundara Babu
N. Natarajan
Affiliation:
National Pulses Research Centre, Pudukkottai, India 622 001
P. C. Sundara Babu
Affiliation:
Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai 625 104, India
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Abstract

Economic injury level (EIL) by the sorghum earhead bug was estimated for nymphs, feeding adults and ovipositing adults of sorghum earhead bug, Calocoris angustatus Lethierry, using malathion or hexachlorocyclohexane (HCH) as insecticidal control measure. EIL varied according to the insecticide used and the stage of the insect. EIL per panicle was 7.9 nymphs, 5.4 feeding adults or 0.06 ovipositing adults when HCH was used, which increased to 15.1 nymphs, 10.5 feeding adults and 0.12 ovipositing adults when malathion was used for control.

Résumé

Le niveau du dommage economique fut estimé pour les nymphes et les adultes de la punaise du sorgho Calocoris angustatus Lethierry, en utilisant l'hexachlorocyclohexane (HCH) ou le malathion pour la lutte insecticidale. Le niveau du dommage economique variait selon l'insecticide utilisé et le stage du developpement de l'insect. Lorsque le HCH a été utilise le niveau du dommage economique par êpi fut de 7.9 nymphes, 5.4 adultes qui s'alimentaient ou 0.06 adultes en état de ponte contre respectivement 15.1, 10.5 et 0.12 quand on utilise le malathion pour la lutte.

Keywords

Sorghum earhead bugCalocoris angustatuseconomic injury levelmalathionhexachlorocyclohexanePunaise du sorghoCalocoris angustatusniveau du dommage economiquemalathionhexachlorocyclohexane
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 3 , June 1988 , pp. 395 - 398
Copyright
Copyright © ICIPE 1988

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References

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