پوسيدگي صورتي سيب زميني معياري براي تفكيك PHYTOPHTHORA MELONIS 1 P.DRECHSLERI

POTATO PINK ROT: A CRITERION FOR DIFFERENTIATION OF PHYTOPHTHORA MELONIS FROM P. DRECHSLERL

Potato pink rot criterion was applied to laboratory differentiation of Phytophthora melonis from P. drechsleri which are morphologically similar and unrecognizable. All P. drechsleri isolates from different parts of the world and various hosts and also its sister phylogenetic taxa P. cryptogea and P. erythroseptica isolates incited pink rot in potato tubers, whereas none of the P. melonis isolates did. Application of pink rot symptoms as a reliable taxonomic character for differentiation of these two morphologically convergent taxa is discussed.