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Optimum larval population of Sesamia calamistis Hmps (Lepidoptera: Noctuidae) for artificial infestation of maize plants

Published online by Cambridge University Press:  19 September 2011

K. I. Nwosu
K. I. Nwosu*
Affiliation:
National Cereals Research Institute, Amakama, P.M.B. 7026, Umuahia, Nigeria
*
* Current address: National Cereals Research Institute, Badeggi, P.M.B 8, Bida, Niger State, Nigeria.
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Abstract

One of the critical factors in assessing maize lines for resistance to Sesamia calamistis is the number of larvae/plant used for infestation. Artificial infestation of maize plants with two and five larvae/plant resulted in 29.1 and 39.5% stand loss (dead hearts and stalk breakage), while 10 and 15 larvae/plant resulted in 52 and 72.9% stand loss, respectively. For a satisfactory artificial infestation in maize screening trials against the maize stem borer in Nigeria, a population level of 10–15 larvae/plant is recommended.

Résumé

Un des critères primordiaux utilisés dans l'évaluation de la résistance des lignées de maïs vis à vis de Sesamia calamistis est le nombre de larves par plante. line infestation artificielie des plants de maïs avec 2 et 5 larves/plant a provoqué une perte sur pied de 29.1 et 39.5 % (coeur mort et casse des tiges) alorsque 10 et 15 larves/plant provoquent une perte de 52 et 72.9 % respectivement. Dans le cadre des cribiages des variétés de maïs au Nigéria contre le foreur de tige, un taux de 10–15 larves est recommendé pour une infestation artificielie satisfaisante.

Keywords

Stem borerinfestationstand lossForeur de tigeinfestationperte sur pied
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 13 , Issue 3 , June 1992 , pp. 369 - 371
Copyright
Copyright © ICIPE 1992

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References

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