Carabid species were twice as abundant in cabbage intercropped with French beans than in a monoculture in the UK

  • Published source details Tukahirwa E.M. & Coaker T.H. (1982) Effect of mixed cropping on some insect pests of Brassicas - reduced Brevicoryneae infestations and influences on epigeal predators and the disturbance of oviposition behavior in Delia-brassicae. Entomologia Experimentalis et Applicata, 32, 129-140


This study is summarised as evidence for the following.

Action Category

Plant more than one crop per field (intercropping)

Action Link
Farmland Conservation
  1. Plant more than one crop per field (intercropping)

    A replicated, controlled, randomized study of a cabbage crop in 1976 in the UK (Tukahirwa & Coaker 1982) found that ground beetle (Carabidae) species were almost twice as abundant in cabbage Brassica oleracea intercropped with French beans Phaseolus vulgaris than in a cabbage monoculture. However, only Bembidion lampros (210 vs 90 individuals), B. quadrimaculatum (400 vs 260), Pterostichus madidus (45 vs 15) and Harpalus spp. were significantly more abundant in intercropped plots. Rove beetles (Staphylinidae) did not tend to differ between treatments. Plots of 10 x 10 m were established in two randomized blocks, each with four treatments: brussels sprouts, brussels sprouts inter-planted with two rows of French beans between each row, brussels sprouts inter-planted with two rows of beans between and across rows and beans alone. Beans were sown in May and brussels sprouts in mid-June 1976. The abundance of adult ground beetles and rove beetles were sampled using two pitfall traps/plot. Aphid (Aphidoidea) and root fly Delia brassicae abundance was also sampled.

Output references

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