Influence of Accessions and Organic Amendment Associated With a Biofertilizer on Fungal Diseases, Plant Biomass and Yield of Common Beans

Abstract

A trial was conducted at the experimental farm of the Institute of Agricultural Research for Development (IARD) Dschang on the use of amendments with bio fertilizers or not against fungal diseases on bean. The 1987 CIAT scale was used to assess disease severity, the biomass and the yield. Three major fungal diseases were recorded in the field, namely angular leaf spot (ALS), floury leaf spot (FLS) and rust. Accession Mancha 3 (9 – 74%) and RWR 3194 (0 – 24%) gave the highest and the lowest disease severity, respectively for the ALS and Rust. The three accessions were more tolerant to Rust than other diseases. The highest fresh biomass (767 g) was obtained in the interaction RWR 3194 x Poultry manure x Biofertilizer, while RWR 3194 x Compost interaction gave the highest number of nodules (204) followed by RWR 3194 x Biofertilizer x Compost interaction (147). Yield was highest in RWR 3194 x NPK 12-6-20 interaction (3.20 t.ha^-1). The highest fresn biomass weight was obtained from the treatment combining accession RWR 3194, bio fertilizer and poultry manure (767g.plant^-1). The study shows that the use of RWR 3194 accession combined with Compost (15 t.ha-¹) or Poultry manure (5 t.ha-¹) and Biofertilizer could be used to improve beans production and in a sustainable soil management program based on their tolerance to diseases and productivity.