Sarma, R Stephen Jebakumar, M Anandaraj, Y R. 2000. “Compatibility of Phorate and Chlorpyriphos With Trichoderma Harzianum (Rifai.) Applied for Integrated Disease Management in Black Pepper (Piper Nigrum L.)”. Journal of Spices and Aromatic Crops 9 (2):111-15. https://www.updatepublishing.com/journal/index.php/josac/article/view/4647.