A Practical Field Guide to B.P. Caton, M. Mortimer, and J.E. HIll i INTERNATIONAL RICE RESEARCH INSTITUTE A Practical Field Guide to Weeds of Rice in Asia B.P. Caton, M. Mortimer, and J.E. Hill 2004 Los Baños, Laguna, Philippines 1 The International Rice Research Institute (IRRI) was established in 1960 by the Ford and Rockefeller Foundations with the help and approval of Contents the Government of the Philippines. Today IRRI is one of 16 nonprofit international research centers supported by the Consultative Group on International Agricultural Research (CGIAR – www.cgiar.org). IRRI receives support from several CGIAR members, including the World Bank, European Union, Asian Development Bank, International Fund for Agricultural Development, International Development Research Centre, Rockefeller Foundation, and agencies of the following govern- ments: Australia, Belgium, Canada, People’s Republic of China, Species by common name in English 5 Denmark, France, Germany, India, Islamic Republic of Iran, Japan, Re- Preface 7 public of Korea, The Netherlands, Norway, Philippines, Spain, Sweden, Acknowledgments 8 Switzerland, Thailand, United Kingdom, United States, and Vietnam. The responsibility for this publication rests with the International Terms and definitions 9 Rice Research Institute. Key to species listings 10 Copyright International Rice Research Institute 2004 BROADLEAF WEEDS 12–51 Mailing address: DAPO Box 7777, Metro Manila, Philippines Aeschynomene aspera 12 Phone: +63 (2) 580-5600, 845-0563, 844-3351 to 53 A. indica 15 Fax: +63 (2) 580-5699, 891-1292, 845-0606 Email:
[email protected] Ageratum conyzoides 16 Home page: www.irri.org Alternanthera sessilis 19 Riceweb: www.riceweb.org Amaranthus spinosus 20 Rice Knowledge Bank: www.knowledgebank.irri.org Courier address: Suite 1009, Pacific Bank Building Commelina benghalensis 23 6776 Ayala Avenue, Makati City, Philippines C.