Effect of cowpea monocultures and polycultures with sorghum and greengram on predatory arthropods

• Published in: Annals of applied biology Vol. 135; no. 2; pp. 457 - 461
• Main Authors: Nampala, P, Ogenga-Latigo, M.W, Kyamanywa, S, Obuo, J.E
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.10.1999; Blackwell
• Subjects: Biological and medical sciences; Biological control; continuous cropping; Control; Cultural control; Fundamental and applied biological sciences. Psychology; insect pests; insect predators; intercropping; IPM; natural enemies; pests; Phytopathology. Animal pests. Plant and forest protection; population density; predators; predators of insect pests; Protozoa. Invertebrates; sole cropping; Sorghum bicolor; Vigna radiata; Vigna unguiculata; Uganda; Africa; Monocotyledones; Cultural control; Treatment efficiency; Cropping system; Vigna radiata; Vigna unguiculata; Mixed farming; Biodiversity; Cereal crop; Monoculture; Grain legume; Sorghum bicolor; Leguminosae; Pest management; Beneficial animal; Gramineae; Animal plant relation; Dicotyledones; Arthropoda; Angiospermae; Spermatophyta; Predator; Invertebrata; Ecological abundance
• ISSN: 0003-4746; 1744-7348
• DOI: 10.1111/j.1744-7348.1999.tb00874.x

SUMMARY Prior to implementing biological control, knowledge on availability of the possible enemies of pest(s) is important. Therefore, as part of a larger on‐farm study whose main objective was to develop a farmer‐friendly package for the management of cowpea pests, the diversity and abundance of insect predators within cowpea cropping systems (sole crops and intercrops) were monitored at three diverse locations in eastern Uganda. Coccinellids, syrphid larvae, spiders, Orius sp. and earwigs were observed at all locations. Abundance of Coccinellids and syrphid larvae were not influenced by the cowpea genotype nor cropping systems. Contrastingly, the abundance of predatory Orius sp., spiders and earwigs differed significantly among the cowpea cropping systems, being more common in the cowpea pure stands and cowpea + greengram than in the cowpea + sorghum intercrops.