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Seasonal Patterns of Leafhopper, Amrasca biguttula biguttula on Okra in India

Published online by Cambridge University Press:  19 September 2011

K. Srinivasan
Affiliation:
Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, India
N. K. Krishnakumar
Affiliation:
Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, India
P. R. Ramachander
Affiliation:
Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, India
G. S. P. Rao
Affiliation:
Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, India
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Abstract

Studies on seasonal patterns of okra leafhopper, Amrasca biguttula biguttula Ishida were conducted for two years. Time series analyses were adopted for working out weekly seasonal index of okra leafhopper. Low incidence of leafhopper was recorded from June to mid-January. Results further revealed that incidence of leafhopper was highly correlated with minimum temperature. There was no discernible time lag for population increase of leafhoppers. Prediction of leafhoppers at different crop growth stages for various months of sowing was done using dummy variable technique.

Résumé

Des études ont été faites pendant une période de 2 ans sur les évolutions saisonnières des cicadelles, Amrasca biguttula biguttula Ishida, qui affectent la plante okra. Les analyses de séries relatives au temps ont été adoptées pour calculer l'index saisonnier hebdomadaire de ces cicadelles. Une incidence basse des cicadelles a été relevée de juin au mi-janvier. Les résultats ont d'ailleurs montré que l'incidence des cicadelles était nettement correlée avec la température minimale. Il n'y avait pas de décalage perceptible de temps pour l'accroissement de population des cicadelles. Utilisant la technique de variables simulées, on pouvait prédire la population des cicadelles aux étapes différentes de la croissance des plantes, c'est à dire, on pouvait prédire la population relative aux mois différents après les semailles.

Type
Research Articles
Copyright
Copyright © ICIPE 1988

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References

REFERENCES

Campbell, J. B. (1978) Spatial variation of sand content and pH within single continguous delineations of two soil mapping units. Soil Sci. Soc. Am. J. 42, 460464.CrossRefGoogle Scholar
Croxton, F. E., Cowden, D. J. and Klein, S. (1969) Applied General Statistics. Prentice-Hall of India Private Limited, New Delhi, India, pp. 319340.Google Scholar
Johnston, J. (1972) Econometric Methods, II Edition. McGraw-Hill Kogakusha Limited, Tokyo, Japan, pp. 176185.Google Scholar
Sidhu, A. S. and Dhawan, A. K. (1981) Seasonal abundance of different insect pests on desi cotton (Gossypium arboreum L.). J. Res. Punjab Agric. Univ. 17, 275281.Google Scholar
Srinivasan, K. and Krishnakumar, N. K. (1983) Studies on the extent of loss and economics of pest management in okra. Trop. Pest Manage. 29, 363370.CrossRefGoogle Scholar
Uthamasamy, S. (1979) Studies on host resistance to certain okra (Abelmoschus esculentus (L.) Moench) varieties to the leafhopper, Amrasca devastans (Dist.) (Cicadellidae: Homoptera) Ph.D. Thesis. Tamil Nadu Agricultural University.Google Scholar