Y R SARMA, J. A. M. A. K. V. R. (1996) “A simple method for indexing Phytophthora and nematode infections in black pepper (Piper nigrum L.)”, Journal of Spices and Aromatic Crops, 5(1), pp. 68–71. Available at: https://www.updatepublishing.com/journal/index.php/josac/article/view/4375 (Accessed: 24 September 2025).