Systemic activity of azadirachtin and neem seed extract on cowpea black aphid.

Authors

  • Manoel Gonçalves Universidade Federal do Ceará
    • Ervino Bleicher Universidade Federal do Ceará

      Keywords:

      alternative control, Azadirachta indica, Aphis craccivora, Vigna unguiculata.

      Abstract

      The effect of azadirachtin and neem seed aqueous extract at different concentrations was studied in greenhouse conditions at “Universidade Federal do Ceará” aiming to the black aphid, Aphis craccivora Koch, control. The treatments were applied on soil to reach root system of cowpea plants previously infested with aphids. The most concentrations of azadirachtin affected the nymphs, with efficacy varying from 39.16 to 83.81% at 192 to 1536 ppm, respectively. The same ocurred with seed extracts, but with a maximum efficacy of 71.40% at 128 g.200 mL-1. The imidacloprid synthetic insecticide caused an efficacy of 99.9%. It was different from the other treatments.

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      Published

      2008-11-19

      Issue

      Vol. 37 No. 2 (2006)

      Section

      Crop Science

      License

      Atribuição
      CC BY

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      How to Cite

      GONÇALVES, Manoel; BLEICHER, Ervino. Systemic activity of azadirachtin and neem seed extract on cowpea black aphid. Revista Ciência Agronômica, [S. l.], v. 37, n. 2, 2008. Disponível em: https://periodicos.ufc.br/revistacienciaagronomica/article/view/83698. Acesso em: 28 jul. 2026.