First Report of Phytophthora cactorum in Lithuania [Pirmas pranešimas apie Phytophthora cactorum Lietuvoje] – Botanica Lithuanica, 12(3): 197–199

Phytophthora cactorum was found for the first time in Lithuania in a rhododendron plantation in Kaunas (Central Lithuania) and subsequently in the collection of rhododendrons at Šiauliai University (Northern Lithuania) in 2004. In August 2005 it was identified on rhododendrons that had been imported from Poland in July. Symptoms included black water-soaked stem lesions resulting in wilting of the aerial parts. A fungus-like organism with morphology typical of Phytophthora cactorum was consistently isolated. The culture showed characteristic features – on selective media at 23 °C the colony was fluffy but not dense, sporangia were caducous, papillate with short pedicles. Cultures were homothallic, typical oospores were observed in culture.

Keywords: Phytophthora cactorum, Phytophthora ramorum, Rhododendron, Lithuania.