Effect of Rhizobium-entomophilous insect interaction on groundnut production in Doba, southern Chad
Abstract
This study investigated the combined effect of Rhizobium inoculation and flower-visiting insects on the productivity of groundnut (Arachis hypogaea) in Doba, southern Chad. Groundnut is a nutritionally and economically important crop, particularly in sub-Saharan Africa where protein-rich food is often scarce. Improving yields through eco-friendly practices like biofertilization and biological pollination can significantly enhance food security. A field experiment was conducted using three treatments : plots with Rhizobium, plots with chemical fertilizer, and control plots. Additionally, flowers were either left open to insect visits or protected to determine the effects of pollinators. Insects such as Amegilla calens, Apis mellifera, and Braunsapis sp. were identified as key pollinators, with Amegilla sp. being the most frequent visitor. Key parameters analyzed included number and weight of pods and seeds. Results showed that both Rhizobium inoculation and pollinator activity significantly increased yields. In plots exposed to pollinators, Rhizobium inoculation led to a marked improvement in pod and seed production compared to controls. The combined presence of Rhizobium and floral insects significantly enhanced groundnut yield components such as pod number, seed number, and seed weight. The findings underscore the potential of integrated agroecological practices specifically the synergistic use of biofertilizers and insect pollinators to sustainably boost crop productivity in regions like southern Chad.
Keywords: Rhizobium, entomophilous, insect, Arachis hypogaea, Doba.
Keywords:
Rhizobium, entomophilous, insect, Arachis hypogaea, DobaDOI
https://doi.org/10.22270/jddt.v15i6.7240References
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Copyright (c) 2025 Josué DERLEMBAYE , Gomoung DOLOUM , Martinien ATAKEWANG DJETOLOUM , Malachie KADA KARIMEL, Nadlaou BESSIMBAYE , Mbaïnguinam MBAILAO
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