DANGEROUS INTERNATIONAL FOREST TREE DISEASES 45 



Host, family, and genus Pathogen Symptoms Continents 



Ranunculaceae: 



Paeonia Cronartium flaccidum Leafrust__ Eur., Asia. 



Rosaceae: 



Crataegus. Clitocybe tabescens Rootrot__ N.A. 



Malus do do Do. 



Helicobasidium mompa do Asia 



Prunus Clitocybe tabescens do N.A. 



Helicobasidium mompa do Asia 



Phymatotrichum omnivorum do N.A. 



Pyrus Clitocybe tabescens do Do. 



Salicaceae: 



Populus Chrondoplea populea Canker Eur., N.A. , 



S.A. 



Helicobasidium mompa Root rot- _ Asia 



Hypoxylon pruinatum Canker N.A. 



Melampsora allii-populina- Leafrust__ Eur. 



M. pinitorqua do Eur., N.A. 



Phymatotrichum omnivorum Rootrot__ N.A. 



Septoria musiva Canker N.A., S.A. 



Septotinia populiperda Leaf blotch Asia, Eur., 



N.A. 



Venturia populina Leaf spot- _ Eur. 



V. tremulae do Do. 



Salix Helicobasidium mompa Rootrot.- Asia 



Santalaceae: 



Comandra Cronartium comandrae Leafrust__ N.A. 



Santalum Sandal virus Spike Asia. 



disease. 

 Sapindaceae: 



Sapindus Phymatotrichum omni- Rootrot N.A. 



vorum. 

 Scrophulariaceae : 



Castilleja Peridermium harknessii Leaf rust. _ Do. 



P. stalactiforme __do Do. 



Euphrasia Cronartium flaccidum __do Eur., Asia. 



Melampyrum do __do Do. 



Peridermium stalactiforme-- __do N.A. 



Nemesia Cronartium flaccidum __do Eur., Asia. 



Paulownia Paulownia virus Witches'- Asia. 



broom. 



Pedicularis Cronartium flaccidum Leafrust__ Eur., Asia. 



Simarubaceae: 



Ailanthus Phymatotrichum omni- Rootrot N.A. 



vorum. 

 Solanaceae: 



Schizanthus Cronartium flaccidum Leaf rust- . Eur., Asia. 



Tamaricaceae: 



Tamarix Phymatotrichum omni- Rootrot N.A. 



vorum. 

 Taxodiaceae: 



Cryptomeria Cercospora cryptomeriae Canker Asia 



Helicobasidium mompa Rootrot-- Do. 



Sequoia Cercospora cryptomeriae Canker Do. 



Tiliaceae: 



Tilia Strumella coryneoidea do N.A. 



Tropaeolaceae: 



Tropaeolum Cronartium flaccidum Leaf rust. _ Eur., Asia 



Ulmaceae: 



Celtis Helicobasidium mompa Root rot _ _ Asia 



Phymatotrichum omnivorum do N.A. 



Ulmus Helicobasidium mompa do Asia 



Morsus ulmi Virus wilt. N.A. 



Phymatotrichum omnivorum Root rot. _ Do. 



Verbenaceae: 



Tectona Olivea tectonae Leafrust__ Asia 



Verbena Cronartium flaccidum do Eur., Asia 



