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Control experiments usingAgrotis segetum granulosis virus againstAgrotis ipsilon [Lep.: Noctuidae] on tobacco seedlings in Northern Pakistan

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Abstract

Agrotis segetum Schiff. granulosis virus propagated in Denmark was applied against released 2nd instar larvae ofAgrotis ipsilon (Hfn.) in tobacco plots in nurseries at Peshawar and Bhurbun (Murree), Northern Pakistan. Nursery bed plots were isolated from the surroundings by net roof and plastic sheets. Granulosis virus concentrations used were 5×107 and 109 capsules per ml water, and 250 ml water per plot (1–4 m2).

Reductions of cutworms as well as cutworm damages varied between 72 and 100% as compared to plots only treated with water. Addition of active coal to the GV did not increase reduction percentages. A possible effect of the GV could be traced one year after treatment.

Résumé

Le virus de la granulose d'Agrotis segetum Schiff. multiplié au Danemark a été appliqué contre le 2e stade des chenilles deAgrotis ipsilon (Hfn.) dans des parcelles expérimentales à Peshawar et Bhurbun (Murree), Pakistan du nord. Les parcelles isolées avec des filets et des feuilles plastiques furent infestées artificiellement en chenilles. Les concentrations de GV utilisées furent de 5×107 et 109 granules par ml d'eau, 250 ml de la suspension préparée étant distribués par parcelle de 1 à 4 m2.

La réduction du nombre de chenilles et celui des plantes endommagées varie de 72 à 100% par rapport aux notations effectuées dans les parcelles traitées avec de l'eau pure. L'addition du charbon actif au GV n'augmente pas son effet. Une action du traitement a été retrouvée un an après l'application.

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Authors and Affiliations

  1. Entomology Branch, Pakistan Forest Institute, Peshawar, Pakistan

    Bashir H. Shah, H. Gul & M. I. Chaudhry

  2. Zoological Institute, Royal Veterinary and Agricultural University, Copenhagen, Denmark

    O. Zethner

Authors
  1. Bashir H. Shah
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  2. O. Zethner
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  3. H. Gul
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  4. M. I. Chaudhry
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Shah, B.H., Zethner, O., Gul, H. et al. Control experiments usingAgrotis segetum granulosis virus againstAgrotis ipsilon [Lep.: Noctuidae] on tobacco seedlings in Northern Pakistan. Entomophaga 24, 393–401 (1979). https://doi.org/10.1007/BF02374178

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  • DOI: https://doi.org/10.1007/BF02374178

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