Cucumber Green Mottle Mosaic Virus (CGMMV)
(Tobamovirus viridimaculae)
Similar Pathogens or Symptoms
Difficult to ID on symptoms alone due to many lookalikes in US; cucumber mosaic virus; alfalfa mosaic virus; watermelon mosaic virus; squash mosaic virus.
Description
CGMMV is considered transient/under official control in the US. Spread to new areas via contaminated seed, water, or soil as well as plant-to-plant. Disease is identified via electron microscopy, serology, and/or molecular methods. Symptom development in hosts depends on environmental conditions.
Not yet found in Alaska.
Host
Scientific name(s): Cucurbitaceae
Common name(s): cucumber, squash, melon, gourds, pumpkin, pigweed, lambs quarters, purslane
Symptoms/Signs
Cucumber - green mottling on leaves and fruit; watermelon - mottling on leaves, brown necrotic lesions on stems, foliage may develop a bleached appearance, premature death, fruit spongy or rotten. Melon - mottling on young leaves that disappears with age, fruit malformed or surface mottled, some cultivars are asymptomatic. Pumpkin/squash/zucchini - foliage can exhibit mottling or be asymptomatic, pumpkin fruit always asymptomatic, zucchini may be asymptomatic or internally discolored and necrotic. Weedy hosts - generally asymptomatic. Foliar symptoms may take 6+ weeks to develop after seed sowing.
Significance
Damage can be severe; substantial loss in quality and yield especially in early infections. Can be asymptomatic in some hosts such as pumpkin and some melons.
Management
Use tested seed - National Seed Health Accreditation Pilot Program; sanitize equipment and tools; lack of chemical options for plants, fields, and greenhouses makes eradication difficult. All infested material must be removed and destroyed as per APHIS-approved methods, fields should be cut, raked, and burned or taken to a landfill for deep burial. Equipment should be pressure washed with detergent.
Difficult to ID on symptoms alone due to many lookalikes in US; cucumber mosaic virus; alfalfa mosaic virus; watermelon mosaic virus; squash mosaic virus.
Description
CGMMV is considered transient/under official control in the US. Spread to new areas via contaminated seed, water, or soil as well as plant-to-plant. Disease is identified via electron microscopy, serology, and/or molecular methods. Symptom development in hosts depends on environmental conditions.
Not yet found in Alaska.
Host
Scientific name(s): Cucurbitaceae
Common name(s): cucumber, squash, melon, gourds, pumpkin, pigweed, lambs quarters, purslane
Symptoms/Signs
Cucumber - green mottling on leaves and fruit; watermelon - mottling on leaves, brown necrotic lesions on stems, foliage may develop a bleached appearance, premature death, fruit spongy or rotten. Melon - mottling on young leaves that disappears with age, fruit malformed or surface mottled, some cultivars are asymptomatic. Pumpkin/squash/zucchini - foliage can exhibit mottling or be asymptomatic, pumpkin fruit always asymptomatic, zucchini may be asymptomatic or internally discolored and necrotic. Weedy hosts - generally asymptomatic. Foliar symptoms may take 6+ weeks to develop after seed sowing.
Significance
Damage can be severe; substantial loss in quality and yield especially in early infections. Can be asymptomatic in some hosts such as pumpkin and some melons.
Management
Use tested seed - National Seed Health Accreditation Pilot Program; sanitize equipment and tools; lack of chemical options for plants, fields, and greenhouses makes eradication difficult. All infested material must be removed and destroyed as per APHIS-approved methods, fields should be cut, raked, and burned or taken to a landfill for deep burial. Equipment should be pressure washed with detergent.
Taxonomic Rank
| Domain: Viruses |
| Realm: Riboviria |
| Kingdom: Orthornavirae |
| Phylum: Kitrinoviricota |
| Class: Tolucaviricetes |
| Order: Tolivirales |
| Family: Tombusviridae |
| Genus: Tobamovirus |
| Tobamovirus viridimaculae |