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Photo Gallery of Vegetable Problems – Pumpkin


Diseases

Curly top

Powdery mildew

Root Rot

Suspected zucchini yellows + watermelon mosaic virus

Suspected virus

Verticillium wilt

White mold

Insect/Mite Pests

Aphids Squash bug Western flower thrips

Abiotic Problems

Edema

(Click on photo to enlarge)

Diseases

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,eggplantcoriander, pepper, potatotomato, various cucurbits such as squashcucumber, pumpkin, watermelon, etc.

Symptoms of curly top on pumpkin leaves. Note yellowing of the foliage.
Photo Source: Ken Eastwell, Washington State University virologist Photo Source: George Clough, Oregon State University Photo Source: Phil Ham, OSU plant pathologist

Online Resources:

Pacific Northwest Plant Disease Management Handbook: Squash (Cucurbita spp.) – Curly Top

Disease: Powdery mildew
Pathogen: Golovinomyces cichoracearum (formerly Erysiphe cichoracearum) and Podosphaera fuliginea (formerly Sphaerotheca fuliginea)
Host crops: All cucurbit vegetables (e.g. cucumber, cantaloupe, melon, pumpkin, andsquash). There are different races of the pathogens.

Photo Source: G.Q. Pelter

Online Resources:

Cucumber, Pumpkin, Squash: Powdery Mildew, Washington State University Hortsense

Disease: Root Rot
Pathogen: Pythium

Photo Source: Jenny Glass

Online Resources: Pacific Northwest Plant Disease Management Handbook: Watermelon (Citrullus lanatus) – Damping-off

Pacific Northwest Plant Disease Management Handbook: Cucumber (Cucumis sativus) – Damping-off

Disease: Suspected zucchini yellows + watermelon mosaic virus
Pathogen:

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Photo Source: G.Q. Pelter

Online Resources:

Disease: Suspected virus
Pathogen: Unknown

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Photo Source: G.Q. Pelter

Online Resources:

Disease: Verticillium wilt
Pathogen: Verticillium species
Host crops: Numerous vegetables including many brassica vegetables (but not broccoli), cucumber, eggplant, pepper, potato, pumpkin, radish, spinachtomatowatermelon, etc.

Photo Source: D.A. Inglis

Online Resources:

Cucumber, Pumpkin, Squash: Verticillium wilt, Washington State University Hortsense

See Diseases, pests, and other problems common to many vegetables: Verticillium wilt.

Insect/Mite Pests

Common name: Bean aphid, green peach aphid, melon aphid, and potato aphid
Latin binomial: Aphis fabae , Myzus persicae, Aphis gossypii, and Macrosiphum euphorbiaerespectively
Host crops: In addition to tomato, eggplant and pepper, bean, melon, sweet corn, corn seed, carrot, cucumber, and eggplant the bean aphid can feed on spinach, Swiss chard, squash, pumpkin, and beet. The green peach aphid can feed on potato, tomato, eggplant, pepper, broccoli, cabbage, spinach, Swiss chard, squash, pumpkin, beet and many weed species including Brassicaceae (cruciferous) weeds. The melon aphid can feed on cucumber, melon, pumpkin, squash, spinach and spinach seed. The potato aphid can feed on cucumber, potato, melon, tomato, pumpkins, squash, and corn seed.

Photo Source: Michael Bush, WSU Extension, Yakima, WA

Online Resources:

Pacific Northwest Insect Management Handbook: Vegetable crop pests-Aphid

Pacific Northwest Insect Management Handbook: Pumpkin and squash – Aphid

Common Insect & Mite: Aphids, Washington State University Hortsense

See Diseases, pests, and other problems common to many vegetables: Aphids

For aphids on other crops see: potato, and squash

Common name: Squash bug
Latin binomial: Anasa tristis
Host crops: Cucurbit vegetables (e.g. pumpkin and squash).

Photo Source: Michael Bush, WSU Extension, Yakima, WA

Online Resources:

Pacific Northwest Insect Management Handbook. Chapter: Vegetables, Section: Pumpkin and Squash, pt.2.

Vegetables: Cucumber, Pumpkin, Squash: Squash bug.. Washington State University Hortsense.

See See Diseases, pests, and other problems common to many vegetables: Squash bug.

Common name: Western flower thrips
Latin binomial: Frankliniella occidentalis.
Host crops: BasilBroccoliCabbageCauliflowerCucumberOnionPotato, Pumpkin, Squash,Tomato and Watermelon.

Photo Source: Michael Bush, WSU Extension, Yakima, WA

Online Resources:

Western Flower Thrips Thysanoptera: Thripidae Frankiniella occidentalis,

Cucurbits: Thrips, UC IPM Online, University of California

See Diseases, pests, and other problems common to many vegetables: Western flower thrips.

Abiotic Problems

Problem: Edema
A physiological Problem: prominent when air is cooler than the soil, soil moisture is high, and relative humidity is high. The low plant transpiration rates combined with an increase in water absorption by roots from the soil leads to increased cell turgor pressure, resulting in eruption of epidermal cells as the inner cells enlarge. Protrusion of the inner cells causes epidermal cells to die and discolor, resulting in a ’warty’ appearance that can be misidentified as a disease. In addition to foliar symptoms on some hosts, many cucurbit crops develop wart-like protruberances on the fruit.

Photo Source: Lindsey du Toit, Washington State University. Photo Source:
Phil Hamm, Oregon State University.
Photo Source: Lindsey du Toit, Washington State University.

 

Online Resources:

http://www.omafra.gov.on.ca/english/crops/facts/00-031/#oedema

http://www.ces.ncsu.edu/depts/pp/notes/oldnotes/gp3.htm