1. 1) J. A. Turner (eds.): “The Pesticide Manual”, 17th Ed., British Crop Protection Council, Hampshire, UK, 2015.
2. 2) http://www.maff.go.jp/j/seisan/kankyo/clopyralid/attach/pdf/clopyralid-31.pdf (Accessed 19 Nov., 2018) (in Japanese).
3. 3) S. Namiki, N. Seike and E. Watanabe: J. Pestic. Sci., accepted.
4. 4) http://www.naro.affrc.go.jp/publicity_report/publication/files/clopyralid_disorder.pdf (Accessed 19 Nov., 2018) (in Japanese).
5. 5) http://www.maff.go.jp/j/seisan/kankyo/clopyralid/attach/pdf/clopyralid-25.pdf (Accessed 19 Nov., 2018) (in Japanese).