“Control of Gray Mold on Tomato Plants by Spraying Piper Nigrum and Urtica Dioica Extracts under Greenhouse Condition”. Iraqi Journal of Science 60, no. 5 (May 26, 2019): 961–971. Accessed December 2, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/794.