Occurrence of Jujube (Zizyhus jujube) Fruit Rot caused by Phytophthora nicotianae and P. palmivora

Lim, Yang Sook; Jung, Ki Chae; Kim, Seung Han; Yoon, Jae Tak

Research in Plant Disease 2002;8(1):41-44.
Published online March 30, 2002.

Phytophthora nicotianae와 P. palmivora에 의한 대추역병 발생

임양숙, 정기채, 김승한, 윤재탁

Occurrence of Jujube (Zizyhus jujube) Fruit Rot caused by Phytophthora nicotianae and P. palmivora

Yang Sook Lim, Ki Chae Jung, Seung Han Kim, Jae Tak Yoon

Abstract

Two species of Phytophthora were isolated from infected fruits of jujube. Among 18 isolates collected, 6 were identified as P. nicotianae and 12 as P. palmivora on the basis of their mycological characteristics. The former produced no caducous, ovoid to spherical sporangia in contrast to caducous, ellipsoid, and broadly ovoid to spherical ones of the latter. These two species were shown to be heterothallic and markedly papilate, chlamydospores abundant, and A1 mating type. They showed strong pathogenicity to fruits of jujube and pear while no symptom was produced on apple fruit by artificial inoculation. This is the first report of jujube fruit rot caused by P. nicotianae and P. palmivora in Korea.

Key Words: Jujube(Zizyhus jujube), Phytophthora nicotianae, Phytophthora palmivora