Exotic Weeds Flora in Crop Fields in Republic of Korea

Chang-Seok Kim1   Jin-Won Kim2,*   Young-Ju Oh3   Sun-Hee Hong3   Su-Jeong Heo4   Chae-Young Lee5   Kee-Woong Park6   Seng-Hyun Cho7   Oh-Do Kwon8   Il-Bin Im9   Sang-Kuk Kim10   Deok-Gyeong Seong11   Young-Jae Chung12   Jeongran Lee2   In-Yong Lee2,*   

1National Institute of Crop Sciences, RDA
2National Institute of Agricultural Sciences, RDA
3Institute for Future Environmental Ecology
4Gangwon-do Agricultural Research & Extension Services
5Chungchengbuk-do Agricultural Research & Extension Services
6Chungnam National University
7Jeollabuk-do Agricultural Research & Extension Services
8Jeollanam-do Agricultural Research & Extension Services
9Bio-Plant Environment Research Center
10Gyeongsangbuk-do Agricultural Research & Extension Services
11Gyeongsangnam-do Agricultural Research & Extension Services
12Shingyeong University


We surveyed the distribution of exotic weeds in Korean paddy fields, uplands, orchards and pastures from 12,568 sites during 3 years, 2013, 2014 and 2015. As a result, 166 species in 28 families were identified and 7, 130, 126, and 80 species were surveyed from paddy fields, uplands, orchards, and pastures, respectively. Among the 166 species, 128 species were annual weed and 38 species were perennial weed. Especially, winter annual exotic weeds were 63 species (37.8%). 46, 16, and 104 exotic weeds were classified to their introduction period of 1st (1876-1921), 2nd (1922-1963), and 3rd (1964-now) period, respectively. The exotic weeds introduced in 2nd and 3rd period, included 12 Invasive Alien Species. The weeds from 1st period, however, could be grouped into native weeds as the ‘naturalized weed’ and managed the same as the native weeds. Especially, some exotic weeds such as common groundsel were widely distributed in Korean crop lands, and they will become more problematic in near future. Therefore, systemic research from the biology to management should be conducted and the results from the studies should be applied practically.


This study was supported joint research project from Rural Development Administration, Republic of Korea (Project number: PJ012533).

Figures & Tables

Fig. 1. Venn diagram of distribution of exotic weeds in Korean crop lands. Venn diagram was drawn by using Venny 2.1.0 (Oliveros, 2007-2015).