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Evaluation of companion crops for thrips (Thysanoptera: Thripidae) management on French bean Phaseolus vulgaris (Fabaceae)

  • J. KasinaEmail author
  • J. Nderitu
  • G. Nyamasyo
  • F. Olubayo
  • C. Waturu
  • E. Obudho
  • D. Yobera
Article

Abstract

Six companion crops, i.e. Tagetes erecta, Daucus carota L., Coriandrum sativum L., Brassica oleraceae L. var. acephala, Capsicum annuum L. and Zea mays L., were evaluated for their efficacy in suppressing field populations of Frankliniella occidentalis (Pergande) and Megalurothrips sjostedti Trybom on French bean Phaseolus vulgaris L. Each companion crop was interplanted with French beans in a 3 × 10 m plot and replicated three times in a completely randomized block design. Fhe thrips populations on French bean flowers in experimental plots were compared with those on beans treated with two insecticides: l-cyhalothrin (Karate 1.75% EC) and methiocarb (Mesurol 500 SC) or untreated (control). Coriandrum sativum, Z. mays and T. erecta are recommended as companion crops for intercropping with French beans to reduce populations of thrips and hence minimize the use of chemical insecticides on this crop.

Résumé

Six plantes associées, i.e. Tagetes erecta, Daucus carota L., Coriandrum sativum L., Brassica oleraceae L. var. acephala, Capsicum annuum L. et Zea mays L., ont été évaluées pour leur capacité à contrôler les populations naturelles de Frankliniella occidentalis (Pergande) et Megalurothrips sjostedti Trybom sur le haricots vert Phaseolus vugaris L. Chaque plante a été plantée en alternance avec des haricots verts dans des parcelles de 3 × 10 m, á raison de trois répétitions par plante dans un bloc complétement aléatoire. Les populations de trips présentes sur les fleurs de haricots verts dans les différentes parcelles expérimentales ont été comparées a celles de haricots verts traités avec deux insecticides L-cyhalothrin (Karate 1,75% EC) et methiocarb (Mesurol 500 SC) et, un témoin. Les résultats montrent que C. Sativum, Z. mays et T. erecta sont les meilleures plantes associées pour réduire l’utilisation des insecticides.

Key words

companion crops intercropping Frankliniella occidentalis Megalurothrips sjostedti Phaseolus vulgaris 

Mots clés

cultures associées Frankliniella occidentalis Megalurothrips sjostedti Phaseolus vulgaris 

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Copyright information

© ICIPE 2006

Authors and Affiliations

  • J. Kasina
    • 1
    Email author
  • J. Nderitu
    • 1
  • G. Nyamasyo
    • 2
  • F. Olubayo
    • 1
  • C. Waturu
    • 3
  • E. Obudho
    • 1
  • D. Yobera
    • 1
  1. 1.Department of Plant Science and Crop ProtectionUniversity of NairobiNairobiKenya
  2. 2.Department of ZoologyUniversity of NairobiNairobiKenya
  3. 3.National Fibre Research CentreKenya Agricultural Research InstituteKerugoyaKenya

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