Welcome to the

8th International Weed Science Congress

"Weed Science in a Climate of Change"

Opens May 2019
Marriott Marquis Queen’s Park
Bangkok, Thailand
21st - 26th June 2020
700 tickets
Register soon!
Marriott Marquis Queen’s Park
Bangkok, Thailand
21st - 26th June 2020

Invitation to the IWSC 2020

21-26 June 2020, Bangkok, Thailand

It is my honor and privilege to invite you to participate in the
8th International Weed Science Congress (IWSC 2020), which will be hosted by the Weed Science Society of Thailand (WSST) and the International Weed Science Society (IWSS) in Bangkok, from 21-26 June 2020. Every four years this event brings more than 650 weed scientists from 55 countries together and promotes an international exchange of the latest research, innovative techniques and development ideas in weed science. The theme of the IWSC 2020 will be “Weed Science in a Climate of Change”.

The congress will consist of outstanding plenary lectures, concurrent lecture and poster sessions on 14 main topics, namely, herbicide resistance, weed biology and ecology, integrated weed management, climate aspects of weed science, non-chemical weed control, application technology, economic and social aspects of weed management, invasive and parasitic plant species, environmental fate of herbicides, physiology of plants and herbicide interaction, weed issues in Asia, new technology of weed management, weed “omics” and modeling. Besides the scientific program, five different excursions are also provided according to personal interest of participants.

Bangkok is always among the world’s top tourist destinations. The city is a true tourist paradise, proved by the growing number of travelers coming each year. There are a great variety of tourist places in Bangkok, mostly historical attractions and temples with elaborate architecture and art. There are also palaces, museums, parks, and a big array of shopping places, from luxury malls to flea and street markets. Bangkok nightlife is another highlight that has attracted many of tourists from all over the world.

The venue for the Congress, Bangkok Marriot Marquis Queen’s Park Hotel, is ideally located within a short walk from the BTS Skytrain and MRT subway and is surrounded by Benjasiri Park (Queen’s Park), department stores and popular attractions. It is a world-class venue providing superb flexibility and versatility with an impressive portfolio of meeting rooms and event spaces for up to 1,500 guests. The Prospectus outlines marketing opportunities to suit every budget and marketing objective. We encourage you to explore the benefits of participating as a sponsor and/or exhibitor.On behalf of the local organizing committee, I hope you will enjoy the IWSC 2020 and look forward to welcoming you to Bangkok in June 2020.

Dr. Chanya Maneechote
President of WSST

IWSC 2020 MAin Topics

Detailed agenda will be announced soon.

Herbicide Resistance

Weed Biology and Ecology

Integrated Weed Management

Climate Aspects of Weed Science

Non-Chemical Weed Control

Economic and Social Aspects of Weed Management

Invasive and Parasitic Plant Species

Environmental Fate of Herbicides

Weed Issues in Asia

Weed 'Omics'


Application Technology

Physiology of Plants and Herbicide Interaction

New Technology for Weed Management

Weed Photo Contest

First global photography contest during the 8th IWSC 2020. The objective is to collect weed pictures from different countries for publishing a book “Global Weeds in 2020” in both online and hard copy.

More Info
Weed Photo Contest will start 15th June 2019


Marquis Queen's Park, Bangkok

199 Sukhumvit Soi 22, Bangkok 10110, Thailand
+66 2 059 5555

Bangkok Marriott Marquis Queen’s Park is a haven for upscale business travel and vacation. Find your respite in spacious hotel rooms and suites, appointed modern amenities and beautiful Thai-inspired accents.

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Registration opens May 2019

Abstract Submission will begin simultaneously with opening of registration on May 2019.

US$ 650
IWSS Member
  • Early bird registration: US$ 650

  • On-site Registration: US$ 750

  • Accompanying Person: US$ 350

Opens May 2019
US$ 700
  • Early bird registration: US$ 700

  • On-site Registration: US$ 800

  • Accompanying Person: US$ 350

US$ 350


  • One Price: US$ 350