Pre- and Post-emergence Herbicides Selected for Scutellaria baicalensis

Jong-Seok  Song1,2   Jisoo Lim1,3   Chuanjie Zhang1,4   Do-Soon Kim1,*   

1Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
2Plasma Technology Research Center, National Fusion Research Institute, Gunsan 54004, Korea
3Farmhannong Co., Ltd., Nonsan 33010, Korea
4College of Animal Science and Technology, Yangzhou University, Jiangsu Province, Republic of China


Lack of herbicides for Scutellaria baicalensis, one of the most important medicinal herbs in traditional Korean medicine, has led to a poor weed control in S. baicalensis cultivation. A greenhouse experiment was conducted to select safe pre-emergence (PRE) and post-emergence (POST) herbicides for S. baicalensis. Of the 6 PRE herbicides tested, pendimethalin only showed an acceptable damage on pre-emergent S. baicalensis even at double the rate of its recommended dose, and alachlor, napropamide, and pendimethalin showed very low damage on post-emergent S. baicalensis. Scutellaria baicalensis was significantly damaged by all the tested POST herbicides at its 5 to 6 leaf stage. Of them, acetolactate synthase inhibitors such as nicosulfuron and thifensulfuron showed relatively low damage, 6% and 15% at double the rates of their recommended doses, respectively, when applied at the 11 to 12 leaf stage of S. baicalensis. Therefore, these results demonstrate that pendimethalin as a PRE herbicide and thifensulfuron and nicosulfuron as a POST herbicide can be sequentially used for weed control in S. baicalensis cultivation.

Figures & Tables

Fig. 1.Visual damage of pre-emergence (PRE) herbicides on applied immediately after sowing under pot conditions. The visual damage (%) was assessed 30 days after application. The vertical bars represent the standard error of the mean of four replicates. a, b: Means with same letter are not significantly different by Tukey’s test at P=0.05.