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Efficacy of Insecticidal Applications Based on Calendar Intervals and Plant Growth Stages for Control of Insect Pests on Cowpea

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Abstract

Studies were carried out to compare the efficacy of insecticide schedules based on calendar intervals with those based on plant growth stages for the control of cowpea insect pests. Spray schedules based on calendar intervals and plant growth stage gave reasonable control of the pest complex and increased grain yields significantly. However, spray schedules based on plant growth stages alone were more efficient for two of the three cowpea varieties tested. This was attributed to differences in maturity periods which made spraying by regular calendar intervals slightly out of phase with attack by key insect pests. Thus, spray schedules based on plant growth stages are recommended for the control of insect pests of cowpea.

Résumé

Des études ont été menées pour comparer l’éfficacité des programmes d’application d’insecticides basés sur les prévisions de calendrier et les stades de croissance de la plante en vue de la lutte contre les insectes ravageurs du niébé. Les programmes de pulvérisation basés sur les prévisions de calendrier et le stade de croissance de la plante ont permis un contrôle raisonnable du complexe du ravageur et ont accru significativement les rendements de grains. Toutefois, les programmes de pulvérisation basés sur le stade de croissance de la plante ont été plus efficaces sur 2 des 3 variétés de niébé testées. Cela a été attribué aux differénces dans les périodes de maturité qui ont déphasé légèrement la pulvérisation à intervalles réguliers de calendrier par rapport à l’attaque du ravageur cible. De ce fait, les programmes de pulvérisation basés sur les stades de croissance de la plante sont recommandées pour lutter contre les insectes ravageurs du niébé.

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Author notes

  1. Aliyageen M. Alghali

    Present address: Department of Crop Protection, Njala University College, PMB, Freetown, Sierra Leone

Authors and Affiliations

  1. International Institute of Tropical Agriculture (IITA), PMB 5320, Ibadan, Nigeria

    Aliyageen M. Alghali

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  1. Aliyageen M. Alghali
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Alghali, A.M. Efficacy of Insecticidal Applications Based on Calendar Intervals and Plant Growth Stages for Control of Insect Pests on Cowpea. Int J Trop Insect Sci 16, 109–112 (1995). https://doi.org/10.1017/S1742758400018397

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  • DOI: https://doi.org/10.1017/S1742758400018397

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