Coriander/cilantro

Diseases

Nematodes

• Root knot

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(Click on photo to enlarge)

Diseases

Bacterial leaf spot

Disease: Bacterial leaf spot
Pathogen: The bacterium Pseudomonas syringae pv. coriandricola. A few other bacterial foliar pathogens of coriander/cilantro have been documented in the Pacific Northwest but are less common, i.e., Xanthomonas campestris pv. coriandri and Xanthomonas hortorum pv. carotae. The parsley bacterial leaf spot pathogen is Pseudomonas syringae pv. apii.
Host crops: Cilantro/coriander. Based on field research, the cilantro and parsley bacterial leaf spot problems are caused by two pathogens: Pseudomonas syringae pv. apii and P. syringae pv. coriandricola. Pseudomonas syringae pv. apii is also the causal agent of bacterial leaf spot diseases of celery and fennel. However, these cilantro and parsley pathogens can infect other crops in the Apiaceae, so plan crop rotation with the possibility of cross infection among cilantro, parsley, celery, and fennel.

Online Resources:

• Coriander and Cilantro (Coriandrum sativum)-Bacterial Leaf Spot, PNW Plant Disease Management Handbook.
• Bacterial Leaf Spot, Cilantro and Parsley Pest Management Guidelines, UC Iintegrated Pest Management Program.

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Curly top

Disease: Curly top
Pathogen: Various strains of Beet curly top virus (BCTV), which are vectored by the beet leafhopper (Circulifer tenellus).
Host crops: Numerous plant species including many vegetables such as bean, beet, carrot, eggplant,
coriander, pepper, potato, tomato, various cucurbits such as squash, cucumber, pumpkin, watermelon, etc.

Online Resources:

• Pacific Northwest Plant Disease Management Handbook: Bean, All (Phaseolus vulgaris) – Curly Top.

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Nematodes

Root knot

Disease: Root knot
Nematode: Meloidogyne species
Host crops: Numerous plant species, including many vegetables such as carrot, coriander, onion, 
potato, etc.

Online Resources:

• Pacific Northwest Plant Disease Management Handbook: Carrot (Daucus carota) – Nematode, Root-knot.
• Pacific Northwest Plant Disease Management Handbook: Nematodes.
• Cilantro Production in California. Vegetable Production Series, UC Vegetable Research & Information Center.
• See Diseases, pests, and other problems common to many vegetables: Root knot.

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