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Relative abundance of field bean (Lablab niger Medick) pod-borers and distribution patterns of the borer, Adisura atkinsoni Moore

Published online by Cambridge University Press:  19 September 2011

A. K. Chakravarthy
A. K. Chakravarthy
Affiliation:
Department of Entomology, University of Agricutural Sciences, Hebbal, Bangalore-560024, India
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Abstract

Studies on the relative abundance of pod-borers and distribution patterns of the dominant borer, Adisura atkinsoni Moore, were conducted at Bangalore (Karnataka, India) with a view to develop a field screening procedure in the field bean, Lablab niger, to pod-borers. Nine species of borers constituted the borer complex on L. niger. The borers population peaked in October.

Eggs and early instar larvae of Adisura followed a clumped distribution pattern. Older larvae, however, were distributed uniformly in the field. Adisura moths preferred to lay eggs between 50.8 and 63.5 cm on the erect type of L. niger and between 101.6 and 114.3 cm on the creeping type of the plant. Plant height had a significant positive correlation with the maximum number of Adisura eggs, but up to nearly 115 cm. Adisura eggs peaked in number during October, while larvae did so during November–December. Implications of the aforementioned observations in field screening are suggested.

Keywords

Field beanpod-borersscreeningsamplingdistribution patternsrelative abundanceAdisura
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 4 , Issue 4 , December 1983 , pp. 401 - 406
Copyright
Copyright © ICIPE 1983

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References

REFERENCES

Anscombe, F. J. (1950) Sampling theory of the negative binomial and the logarithmic series distributions. Biometrika 37, 358–382.CrossRefGoogle ScholarPubMed
Arbous, A. G. and Kerrich, J. E. (1951) Accident statistics and concept of accident proneness. Biometrics 7, 340–432.CrossRefGoogle Scholar
Chakravarthy, A. K. (1977) Pod border resistance in Lablab niger Medick cultivars with special reference to the pod borer, Adisura atkinsoni Moore (Lepidoptera: Noctuidae). M.Sc. thesis, U.S.A., Bangalore, pp. 122.Google Scholar
Govindan, R. (1974) Insects of the field bean (Lablab niger var. Lignosus Medikus). M.Sc. thesis, U.A.S., Bangalore, pp. 127.Google Scholar
Krishnamurti, B. and Appanna, M. (1948) The major pod borer (Adisura atkinsoni M.) of Dolichos lablab (Avare). Ent. Ser. Bull., No. 13.Google Scholar
Gosta, Nachman (1981) Temporal and spatial dynamics of an acarine predator-prey system. J. anim. Ecol. 50, 435–52.Google Scholar
Regupathy, A., Palaniswamy, G. A. and Krishnan, R. H. (1970) Assessment of loss in seed yield by pod borers in certain varieties of field bean. Madras agric. J 57, 274–278.Google Scholar
Southwood, T. R. E. (1978) Ecological Methods. Methuen, London. 391 pp.Google Scholar