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Determination of Economic Injury Level of the Stem Borer, Chilo Partellus (Swinhoe) in Maize, Zea Mays L.

Published online by Cambridge University Press:  19 September 2011

K. V. Seshu Reddy  and
K. O. S. Sum
K. V. Seshu Reddy
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P. O. Box 30772, Nairobi, Kenya
K. O. S. Sum
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P. O. Box 30772, Nairobi, Kenya
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Abstract

The economic injury level (EIL) of the maize stem borer, Chilo partellus (Swinhoe) was determined by artificially infesting maize (cv. Katumani) plants at three different growth stages; viz, 20, 40 and 60 days old plants with varying densities of newly hatched larvae; viz, 2, 4, 6, 8, 10 and 12 per plant constituting the borer population. The grain yield data obtained from the infested and the protected plants showed that maximum yield reduction and stalk damage occurred to the 20-day old crop, while there was insignificant larval effect on yields for the 60-day old crop. Regression analyses gave a significant linear equation (y = a + bx) which estimated the yields per plant at different infestation levels and these were used to calculate the economic injury level at each stage. The resultant EIL was 3.2 and 3.9 larvae/plant for 20- and 40-day old plants, respectively.

Résumé

Le niveau de dégâts economiques par le boreur du maïs, Chilo partellus (Swinhoe) a été déterminé, après infestation artificielle des plantes de maïs (cv. Katumani) agées de 20, 40, et 60 jours, et en faisant varie la densité de larves nouvelles-nées de 2, 4, 6, 8, 10 et 12 chenilles par plante. Le maximum de réduction de rendement et de dégâts de tiges est apparu sur les plantes agées de 20 jours. Par contre, il n'y a pas eu d'effet significatif des larves sur le rendement des plantes de 60 jours. L'analyse de regression a donné une equation lineaire (y = a + bx), laquelle a permis d'estimer le rendement par plante différents niveaux d'infestation, et de calculer le niveau de dégâts economiques de chaque stade. Le niveau de dégâts economiques a été de 3, 2 et de 3, 9 larves/plante pour les plantes agées de 20 et 40 jours, respectivement.

Keywords

Economic injury level (EIL)stem borerChilo partellusmaizeyield lossesNiveau de dégâts economiquesboreur de tigeChilo partellusmaïsperte de rendement
Type
Articles
Information
International Journal of Tropical Insect Science , Volume 12 , Issue 1-2-3: Current Topics in Tropical Entomology , June 1991 , pp. 269 - 274
Copyright
Copyright © ICIPE 1991

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References

REFERENCES

Bardner, R. (1968) Wheat bulb fly, Leptohylemyia coarcata Fall. and its effect on the growth and yield of wheat. Ann. Appl. Biol. 61, 1–11.CrossRefGoogle Scholar
Chatterji, S. M., Young, W. R., Sharma, G. C., Sayi, I. V., Chahal, B. S., Khare, B. P., Rathore, Y. S., Panwar, V. P. S. and Siddiqui, K. H. (1969) Estimation of loss in yield of maize due to insect pests with special reference to borers. Ind. J. Entomol. 31, 109–115.Google Scholar
Cheshire, J. M. Jr, Funderburk, J. E., Zimet, D. J., Mack, T. P. and Gilreath, M. E. (1989) Economic injury levels and binomial sampling program for lesser cornstalk borer (Lepidoptera: Pyralidae) in seedling grain sorghum. J. econ. Entomol. 1, 270–274.CrossRefGoogle Scholar
Faleiro, J. R. and Rai, S. (1988) Yield infestation relationship and economic injury level for okra leafhopper management in India. Trop. Pest Manage. 34, 27–30.CrossRefGoogle Scholar
Harvey, T. L. and Hackerot, H. L. (1970) Chemical control of a green bug on sorghum and infestation effects on yield. J. econ. Entomol. 63, 1536–1539.CrossRefGoogle Scholar
Hoyt, S. C. and Burts, E. C. (1974) Integrated control of fruit pests. A. Rev. Entomol. 19, 231–252.Google Scholar
Rogers, C. E. (1976) Economic injury level of Contarinia taxana on guar. J. econ. Entomol. 69, 693–696.Google Scholar
Sarup, P., Sharma, V. K., Panwar, V. P. S., Siddiqui, K. H., Marwaha, K. K. and Agarwal, K. N. (1977) Economic threshold of Chilo partellus infesting maize crop. J. entomol. Res. 1, 92–99.Google Scholar
Seshu Reddy, K. V. (1988) Assessment of on-farm yield losses in sorghum due to insect pests. Insect Sci. Applic. 9, 679–685.Google Scholar
Sharma, N. and Sharma, V. K. (1987) Studies on economic injury level in maize, Zea mays L. to stem borer Chilo partellus (Swinhoe) (Pyralidae: Lepidoptera) in India. Trop. Pest Manage 33, 44–51.CrossRefGoogle Scholar
Stern, V. M., Smith, R. F., Van den Bosch, R. and Hegen, K. S. (1959) The integrated control concept. Hilgardia 29, 81–101.CrossRefGoogle Scholar
Stone, J. D. and Pedigo, L. P. (1972) Development and economic injury level of green clove worm on soybean in Iowa. J. econ. Entomol. 65, 197–201.CrossRefGoogle Scholar
Sylven, E. (1968) Threshold values in the economics of insect pest control in agriculture. PANS 14, 356–366.Google Scholar
U.S. National Academy of Sciences (1969) Insect pest management and control. V. 3 Principles of Plant and Animal Pest Control. Washington DC, USA National Academy of Sciences.Google Scholar
Van den Bosch, R. and Stern, V. M. (1962) The integration of chemical and biological control of arthropod pests. A. Rev. Entomol. 7, 367–386.CrossRefGoogle ScholarPubMed
Walker, P. T. (1962) The relation between infestation by the stalk borer Busseola fusca and yield of maize in E. Africa. Ann. Appl. Biol. 48, 780–786.CrossRefGoogle Scholar
White, R. M. (1946) Preliminary observations on some effects of artificial defoliation of wheat plants. Sci. Agric. 26, 225–229.Google Scholar