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Photo Gallery of Vegetable Problems Swiss – Chard


Diseases

Ramularia leaf spot Rhizoctonia basal petiole and crown infection

Insect/Mite Pests

Aphids

Lygus bugs

Springtails

(Click on photo to enlarge)

Diseases

Disease: Ramularia leaf spot
Pathogen: Ramularia beticola
Host crops: Most vegetables in the Chenopodiaceae, i.e., sugar beet, table beet, and Swiss chard.

Ramularia leaf spot on Swiss chard leaves.
Photo Source: D.A. Inglis,
Washington State University
Photo Source: Lindsey du Toit,
Washington State University

Online Resources:

Pacific Northwest Plant Disease Management Handbook: Sugar Beet (Beta vulgaris) – Ramularia Leaf Spot


Disease: Rhizoctonia basal petiole and crown infection
Pathogens:Rhizoctonia
Host crops: Many vegetables are susceptible to infection by Rhizoctonia spp., which are common soilborne fungi. In beet and Swiss chard, these fungi can infect the base of petioles and the crown or main root at or below the soil surface, particularly in moist soil conditions. During very wet conditions, infection can also occur on the leaves.

Photo Source: Lindsey du Toit, Washington State University

 

Online Resources:

Pacific Northwest Plant Disease Management Handbook

Insect/Mite Pests

Common name: Aphids (various types)
Latin binomialAphis fabae (bean aphid), Myzus persicae (green peach aphid)
Host crops: Table beet, sugar beet, Swiss chard, and various other vegetable and weed plant species

Photo Source: Lindsey du Toit, Washington State University

Online Resources:

http://insect.pnwhandbooks.org/vegetable/vegetable-pests/hosts-and-pests/chard-swiss-aphid

 


Common Name: Lygus bugs
Latin binomial: Lygus spp.
Host crops: Numerous different species of vegetables and other crops, e.g., alfalfa, beet, cabbage, carrotspinach, Swiss chard, etc. Lygus bugs can cause different types of damage to various growth stages of different crops. They cause blackheart on celery, blasting on flower tissues, collapse of asparagus spears, decreased yields in carrot, beet, spinach, and other seed crops, etc.

Photo Source: Bev Gerdeman, WSU Entomologist

Online Resources:

Pacific Northwest Insect Management Handbook: Vegetable crop pests – Lygus bug


Common Name: Springtails (subterranean types)
Latin binomial: Order Collembola. There are numerous types of springtails or collembola, which are divided into two groups – subterranean springtails and surface springtails.
Host crops: Multiple vegetables, but most damage has been reported on spinach and beets, primarily in heavier, organic soils during very wet, cool spring conditions.

A subterranean springtail extracted from soil in a spinach seed crop.
Photo Source: Lindsey du Toit, Washington State University

Online Resources:

Springtails Springtails in Sugarbeet: Identification, Biology, and Management. North Dakota State University, Fargo

Control of Subterranean Springtails in Sugarbeet Using Granular, Liquid, and Seed Treatment Insecticides. North Dakota State University, Fargo

Springtail feeding on emerging crops (especially sugarbeet). Michigan State University

Pest: Springtail. Pest Spotter, Bayer CropScience