Effect of different dates of sowing cowpea on the severity of leaf rust caused by Uromyces phaseoli var. vignea. Tropical Agriculture, [S. l.], v. 66, n. 2, 1989. Disponível em: https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/1850.. Acesso em: 24 jul. 2024.