Systematics of Mycosphaerella species associated with the invasive weed Fallopia japonica, including the potential biological control agent M. polygoni-cuspidati

Daisuke Kurose, Harry C. Evans, Djamila H. Djeddour, Paul F. Cannon, Naruto Furuya, Kenichi Tsuchiya

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Native to Japan, Fallopia japonica, most frequently referred to as Japanese knotweed, is a highly problematic invasive weed, particularly in the UK and North America. During surveys for natural enemies of this plant in Japan, two species of Mycosphaerella were collected. One of these was identified as M. polygoni-cuspidati, and is redescribed and neotypified. Causing a damaging leaf spot disease of F. japonica throughout its natural range in Japan, it is absent from the host's exotic range. The restriction of M. polygoni-cuspidati to F. japonica in its center of origin, together with its severe impact on host fitness, indicates that this is a coevolved natural enemy with high potential as a classical biological control agent for the long-term management of this ecologically and economically important weed. In the field, the fungus has a reduced life cycle, with only spermogonia and pseudothecia (ascomata) being formed. Ascospores are the primary source of infection, and studies show that the mycelium from in vitro cultures is also infective and hyphae penetrate mainly via the stomata. A further, undescribed species of Mycosphaerella co-occurs with M. polygoni-cuspidati, here proposed as the new species M. shimabarensis. Both species have been studied using cultural, morphological and molecular phylogenetic methods.

Original languageEnglish
Pages (from-to)179-189
Number of pages11
JournalMycoscience
Volume50
Issue number3
DOIs
Publication statusPublished - Jan 1 2009

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Reynoutria japonica
Mycosphaerella
biological control
biological control agents
weed
weeds
natural enemy
taxonomy
Japan
natural enemies
leaf spot
stomata
center of origin
ascomata
fitness
ascospores
life cycle
fungus
in vitro culture
hyphae

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics

Cite this

Systematics of Mycosphaerella species associated with the invasive weed Fallopia japonica, including the potential biological control agent M. polygoni-cuspidati. / Kurose, Daisuke; Evans, Harry C.; Djeddour, Djamila H.; Cannon, Paul F.; Furuya, Naruto; Tsuchiya, Kenichi.

In: Mycoscience, Vol. 50, No. 3, 01.01.2009, p. 179-189.

Research output: Contribution to journalArticle

Kurose, Daisuke ; Evans, Harry C. ; Djeddour, Djamila H. ; Cannon, Paul F. ; Furuya, Naruto ; Tsuchiya, Kenichi. / Systematics of Mycosphaerella species associated with the invasive weed Fallopia japonica, including the potential biological control agent M. polygoni-cuspidati. In: Mycoscience. 2009 ; Vol. 50, No. 3. pp. 179-189.
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