Bacterial Black Stem Rot on Angelica acutiloba Caused by Xanthomonas campestris

Han, Kwang Seop; Shim, Myoung Yong; Oh, In Seok; Han, Kyu Hung; Choi, Jae Eul

The Plant Pathology Journal 2002;18(1):54-55.
Published online February 28, 2002.

Bacterial Black Stem Rot on Angelica acutiloba Caused by Xanthomonas campestris

Kwang Seop Han, Myoung Yong Shim, In Seok Oh, Kyu Hung Han, Jae Eul Choi

Abstract

Soaked black rot symptom was observesd on the stem of Angelica acutiloba from July to August 2000 at Kumsan, Chungnam in Korea. This disease usually occurred under humid and high temperature conditions. The lesions on the stem appeared as soft rot with brown elliptical spots, which developed into large black spots at a later stage. When the bacterial isolates from the diseased plants were inoculated onto healthy plants by artificial needle prick method, symptoms similar to that observed in the fields developed. According to the cultural characteristics and pathogenicity of the isolates on the host plant, the causal bacterium was identified as Xanthomonas campestris. This study proposed that the disease be named "bacterial black stem rot of A. acutiloba".

Key Words: Angelica acutiloba, bacterial black stem rot, Xanthomonas campestris