Welcome to International Weed Science Society

The International Weed Science Society (IWSS) was formed in 1975, by individuals from Europe, North America, South America, and the Asian-Pacific area, to deal with global weed science issues. The Society has held six highly successful International Weed Control Congresses, in Australia (1992), Denmark (1996), Brazil (2000), South Africa (2004), Canada (2008) and China (2012). The IWSS is a worldwide scientific organization, open to all who are interested in weeds and their control. The formation of IWSS was promoted actively by the six existing regional weed science societies. The purpose of IWSS is to supplement and complement their vital role... + Read more

President's Message

Our 7th International Weed Science Congress in Prague could only be described as a great scientific and cultural experience. To all who attended the Congress, presented papers and posters, attended the various sessions and workshops, graced the special meetings and social events, and most especially those who were at the helm of the scientific program and the local organization, and those who ran the various events - THANK YOU. You had volunteered invaluable time and made personal sacrifices toward realizing our goals and I cannot thank you enough for your service, for your unconditional support.
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Photo Gallery


More At IWSS

Activities and Objectives

The IWSS publishes a newsletter that is sent to members twice a year and holds the International Weed

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The following proceedings are available as pdf files and their size is shown within parentheses.

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The IWSS publishes a newsletter that is sent to members twice a year. The available newsletters are listed.

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Awards & Fellowships

Every four years, the International Weed Science Society (IWSS) bestows awards to weed scientists who

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