Welcome to the

8th International Weed Science Congress

"Weed Science in a Climate of Change"

Open soon
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

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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Graduate Students Travel Grants and Award

The IWSS is continuing its tradition of promoting and supporting the participationof graduate (M.Sc. and Ph.D.) students in the International Weed ScienceCongresses.

More Info

Registration opens May 2019

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

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

  • Accompanying Person: US$ 350

On-Site Registration:
US$ 750

Open soon
US$ 700
  • Early bird registration: US$ 700

  • Accompanying Person: US$ 350

On-Site Registration:
US$ 800

OPEN soon
US$ 300
  • Early bird registration:
    US$ 300

On-Site Registration:
US$ 400