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Published in Scientific Papers. Series B, Horticulture, Vol. LXVII, Issue 2
Written by Nicholus MNYAMBO, Moses TIMANA, Mmagadima SEBATI, Lerato KGOTSE, Zakheleni DUBE

Bambara groundnut (BG) is third most important legume in sub-Saharan Africa. Currently, there are no commercial varieties, and reports of Meloidogyne species impacts have been made without empirical evidence. The withdrawal of synthetic nematicides has increased the demand for alternative products. Therefore, the objectives of this study were to determine the resistance status of BG varieties to M. incognita and potential use of Maerua angolensis extract in the control of M. incognita and growth of BG varieties. Screening experiment: six BG varieties were inoculated with ≈5000 M. incognita eggs and second-stage juveniles under greenhouse condition. Management experiment: 6 x 5 factorial experiment under similar conditions. The first factor consisted of retained BG varieties and the second factor was made up of M. angolensis extract levels, fenamiphos, and untreated control. At 30 days after inoculation, all the six varieties were hosts to M. incognita at varying degrees, but plant growth variables were not sensitive to the nematode. Plant extracts had no direct effects on nematode numbers but increased the BG varieties tolerance to nematode attack.

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