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Optimum Larval Population of Sesamia Calamistis HMPS (Lepidoptera: Noctuidae) for Artificial Infestation of Maize Plants

  • K. I. Nwosu
Research Article

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.

Key Words

Stem borer infestation stand loss 

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. Une infestation artificielle 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.

Mots Clés

Foreur de tige infestation perte sur pied 

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References

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Copyright information

© ICIPE 1992

Authors and Affiliations

  • K. I. Nwosu
    • 1
  1. 1.National Cereals Research Institute, AmakamaNigeria

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