Asian Pacific Weed Science Society Asociación Latinoamericana de Malezas (ALAM) Canadian Weed Science Society Council of Australasian Weed Societies (CAWS) European Weed Research Society International Survey of Herbicide Resistant Weeds International Weed Science Society New Zealand Plant Protection Society (Inc.) North Central Weed Science Society Northeastern Weed Science Society Sociedad Española de Malherbología (SEMh) (Spanish Weed Science Society) Società Italiana per la Ricerca sulla Flora Infestante (S.I.R.F.I.) (Italian Weed Research Society) Southern Weed Science Society Weedscience Society of America Weed Science Society of China Weed Science Society of Japan Weed Science Society of Pakistan (WSSP) Weed Science Society of the Republic of China (WSSROC TAIWAN) Western Society of Weed Science