Performance of soybean genotypes (Glycine Max L.) against Asian rust (Phakopsora Pachyrhizi Syd.) in Cameroon

Asian rust caused by Phakopsora pachirhizi, which is a major constraint to production of soybean, causing 90% yield losses in field. Synthetic fungicides used control this disease are environmentally degrading and have negative impact on the health producers consumers. The use resistant soybean genotypes can be an effective alternative. aim work evaluate tolerance varieties under natural conditions. Forty-three were screened using completely randomized block design with three replicate. Incidence severity at 6, 8 10 weeks after sowing (WAS) yields evaluated. Results show that incidence was significantly higher local variety R3 (16.67%; 29.63%; 75.93%) WAS respectively. At 6 (21.17% 24.14% respectively). TGX-2010-12F has highest (1.17 t ha-1) than (0.17 ha-1). Principal component analysis realized incidence, 8, shows 12 highly susceptible rust, moderately resistant, 19 susceptible. This study attacks all Moderately varieties, advised growers appropriate protection methods or subject varietal improvement through genetic techniques.