Phytophthora hedraiandra occurs on rhododendron in Slovenia

Fecha de publicación

Vie, 15 Sep 2006, 00:00

Última actualización

Sept. 14, 2006, 9:01 a.m.

Número del informe

SVN-02/3

País

Slovenia

Plaga identificada

Phytophthora hedraiandra - (PHYTHD)

Estado del informe

Final

Hospederos

Rhododendron

Pest Status (old values from ISPM 8 -1998 )

• Present: under eradication

Pest Status (ISPM 8 - 2021)

• Present: not widely distributed and under official control

Distribución geográfica

Kranj - Gorenjska region (central Slovenia)

Resumen

A similar isolate was obtained in both years, which was then inoculated within four days on cornmeal agar (CMA) and incubated at 25 C. The cultures grew around 6 mm daily. A few papillate, subglobose sporangia appeared after two weeks, occurring abundantly when mycelial plugs were submerged in pond water. Oogonia were 29 -33 µm (31 µm) and oospores were 24-29 µm (26 µm); amphigynous antheridia were infrequent. The morphological characters resembled those described for Phytophthora cactorum or P. hedraiandra.

Peligro

In July 2004 and July 2005, necrotic lesions on shoots were found, with dieback and wilting in severe cases, on established rhododendron bushes.

Archivos de informes

Sitio web

http://www.bspp.org.uk/ndr/jan2007/2006-64.asp