02232nas a2200265 4500008004100000022001400041245006900055210006700124260002900191300001200220490000800232520141000240653002001650653002501670653002701695653003001722653002401752653002601776653002601802653002801828100001801856700001701874700002001891856005501911 2009 eng d a1439-043400aA survey of Phytophthora species on Hainan Island of south China0 asurvey of Phytophthora species on Hainan Island of south China bBlackwell Publishing Ltd a33–390 v1573 a

Abstract During the period 1997–2007, a comprehensive study of the occurrence and distribution of Phytophthora species was conducted on Hainan Island of South China. To date, 14 species of Phytophthora have been recovered and their distribution determined. Phytophthora nicotianae (=P. parasitica) is the most important species attacking a wide variety of crops, followed by Phytophthora capsici and Phytophthora citrophthora. In contrast to Phytophthora colocasiae attacking taro leaves throughout the entire island, Phytophthora cyperi was found only once on Digitaria ciliaris in Danzhou. It is of interest to note that Phytophthora heveae, Phytophthora katsurae and Phytophthora insolita are commonly found in forest soil/water of protected mountains without causing any plant diseases. Although Phytophthora species are usually terrestrial or found in fresh water, one isolate of Phytophthora resembling closely the asexual isolates of P. insolita in Hainan was obtained from decaying Rhizophora leaves submerged in seawater. An unidentified Phytophthora species producing non-papillate; internally proliferating sporangia was isolated from the soil in which Ceriops tagel and Bruguiera serangula were growing in a salt water shrimp farm.

10amarine isolates10aPhytophthora capsici10aPhytophthora cinnamomi10aPhytophthora citrophthora10aPhytophthora heveae10aPhytophthora insolita10aPhytophthora katsurae10aPhytophthora nicotianae1 aZeng, Hui-cai1 aHo, Hon-hing1 aZheng, Fuy-Cong uhttp://dx.doi.org/10.1111/j.1439-0434.2008.01441.x