Oregon State University Plant Clinic

High Significance Pests for the Western Region (NPDN)

Fungal diseases

Downy mildew of corn and grasses
(Peronosclerospora philippinensis)

Sudden oak death/Ramorum blight and dieback
(Phytophthora ramorum)

Late blight of potato and tomato
(Phytophthora infestans)

Bacterial diseases

Xylella fastidiosa of grapevines and ornamentals
(Xylella fastidiosa)

Bacterial wilt of geranium, potato, and banana
(Ralstonia solanacearum, biovar 2, races 2, 3)

Insects

Fruit fly complex

Gypsy moth complex

Nematodes

Golden nematode
(Globodera spp.)

Weeds

Broomrape
(Orobanche spp.)

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