Der Perlentaucher unter den Buchläden Eichendorff21

**Zhenghao Xu** is a professor of environmental and resource sciences at Zhejiang University, China. He graduated from Zhejiang Agricultural University, China in 1985 and completed his Master's degree at the same university in 1993. **** He subsequently engaged in weed research work at China Rice Research Institute for more than 10 years. He received his Ph. D. in Agriculture from China Agricultural University in 2003 and finished his post- doctoral research at Zhejiang University, China in 2006. His research chiefly focuses on weed management, biological invasion and allelopathy. Dr. Xu has published over 40 papers and 7 books, mainly dealing with weed research, control of invasive species and allelopathic mechanisms. He was recently honored with 4 Science and Technology Progress Awards in Zhejiang, China. **** **Hangying Qi** graduated from Zhejiang Agricultural University, China in 1989. Her research focuses on crop science, weed management and invasive species. She has published over 23 papers and 5 books, mainly dealing with weed management in paddy fields, invasive weeds in China and the mechanisms influencing crop yield. She has won 14 Science and Technology Progress Awards in Zhejiang, China.