OCCURRENCE OF POWDERY MILDEW CAUSED BY Podosphaera sp. ON INVASIVE WEED Ageratum houstonianum IN NEPAL. BIOTROPIA [Internet]. 2026 May 8 [cited 2026 Sep. 12];33(2):260-5. Available from: https://journal.biotrop.org/index.php/biotropia/article/view/podosphaera-causing-powdery-mildew-on-ageratum-houstonianum