NMSU Onion Publications

Onion Extension Presentations and Posters

Presentations

[Onion and Curcurbit Diseases]
[Onion Diseases]

Posters

Onion Diseases in New Mexico

Onion Diseases caused by Viruses

Iris Yellow Spot Virus on onions (Photo: Natalie Goldberg, NMSU)

Disease: Iris Yellow Spot

Pathogen: Iris Yellow Spot Virus

Vector: Onion Thrips (Thrips tabaci)

Host: Onions, garlic, leeks, lisianthus, iris, weeds (redroot pigweed, jimsonweed, tobacco)

Iris Yellow Spot Virus Publication

More Images

Onion Diseases caused by Bacteria

Bacterial soft rot of onion (Photo: Howard F. Schwartz, Colorado State University, Bugwood.org)

Disease: Bacterial soft rot

Pathogen: Pectobasidium carotovorum subsp. carotovorum (= Erwinia carotovora subsp. carotovora)

Hosts: Onions and many other vegetables and fruit

Slippery skin on onions

Disease: Slippery Skin

Pathogen: Burkholderia gladioli pv. alliicola (=Pseudomonas gladioli pv. alliicola)

Host: Onions and gladiolus

Sour skin on onions

Disease: Sour Skin

Pathogen: Burkholderia cepacia (=Pseudomonas cepacia)

Hosts: Onions and other Allium spp.

Onion Diseases caused by Fungi

Black mold on onions (Photo: New Mexico State University)

Disease: Black Mold

Pathogen: Aspergillus niger

Host: Onions, garlic and many other plants including peanuts, apples, tomatoes, beans and corn

More Images

Botrytis on onions (Photo: Howard F. Schwartz, Colorado State University, Bugwood.org)

Disease: Botrytis neck rot, Botrytis bulb rot

Pathogen: Botrytis allii, Botrytis squamosa, Botrytis cinerea, and other Botrytis spp.

Hosts: Onions and many other plants

More Images

Fusarium basal rot on onions (Howard F. Schwartz, Colorado State University, Bugwood.org)

Disease: Fusarium basal rot

Pathogen: Fusarium oxysporum fsp. cepa

Host: Onions

More Images

Pink root on onions (Photo: Natalie Goldberg, NMSU)

Disease: Pink root

Pathogen: Phoma terrestris (= Pyrenochaeta terresris)

Host: Onions and many other plants

Pink Root Fact Sheet

Powdery mildew on onions (Photo: Natalie Goldberg, NMSU)

Disease: Powdery mildew

Pathogen: Oidiopsis taurica (= Leveillula taurica)

Host: Onions and many other plants

More Images

Purple blotch on onions (Photo: Howard F. Schwartz, Colorado State University)

Disease: Purple Blotch

Pathogen: Alternaria porri

Host: Onions, garlic, Egyptian onion, Welsh onion, leeks and other Allium species

More Images

Onion Diseases caused by Nematodes

Root knot nematode on onions (Photo: Steve Thomas, New Mexico State University)

Disease: Root Knot Nematode

Pathogen: Meloidogyne incognita and other Meloidogyne spp.

Host: Onions and many other plants

More Images