Phytotoxic effects of invasive Ageratina adenophora on two native subtropical shrubs in Nepal oleh Tej Bahadur Darji, Barsha Adhikari, Seeta Pathak, Shristi Neupane, Lal B. Thapa, Tara Datt Bhatt, Ramesh Raj Pant, Gunanand Pant, Khadka Bahadur Pal, Kiran Bishwakarma