Viruses

Tobraviruses

TOBACCO RATTLE VIRUS

ssRNA, bi-partite rigid rod

Viruses

Tobraviruses

TOBACCO RATTLE VIRUS

Nematode Transmitted (the dorylaim, Trichodorus)

Viruses

Tobraviruses

Viruses

Cucumoviruses

CUCUMBER MOSAIC VIRUS

(ssRNA, spherical)

Viruses

Cucumoviruses

1. Stylet-borne (non-persistent) by many aphids
2. Very wide host range, yet not as common as potyviruses
3. Scenario (control by roguing)

Viruses

Closteroviruses

CITRUS TRISTEZA

(ssRNA, long flexuous rod)

Viruses

Closteroviruses

1. Semi-persistent by several citrus-feeding aphids
2. Narrow Host range
3. Severe strains, brown citrus aphid of concern
4. Scenario (Stock/scion incompatibility problem)

Viruses

Tobamovirus

TOBACCO MOSAIC VIRUS

(ssRNA, rigid rod)

Viruses

Tobamovirus

1. No natural vector/human contact
2. Extremely stable
3. Moderately wide host ranges
4. Scenario (wild vs. cultivated orchids)

Viruses

Potexviruses

POTATO X VIRUS

(ssRNA, flexous rod)

Viruses

Potexviruses

1. No natural vector/ human contact
2. Extremely stable
3. Moderately wide host ranges
4. Scenario (Bolivian vs. US potatoes)

Viruses

Geminiviruses

TOMATO MOTTLE/TOMATO LEAF CURL

(ssDNA, geminate)

Viruses

Geminiviruses

1. Whitefly (esp. sweet potato whitefly)
2. Moderate host ranges (Solanaceae, Malvaceae, Fabaceae)
3. Recent Phenomenon in southFlorida (introductions/climate)
4. Scenario (overlapping crops)

Viruses

Tospoviruses

TOMATO SPOTTED WILT

(ssRNA, spherical with lipid membrane)

Viruses

Tospoviruses

1. Thrips transmitted (esp. western flower thrips)
2. Extraordinary wide host range
3. Recent phenomenon in north Florida (climate)
4. Scenario (greenhouses vs. fields and inoculum proximity)

Viruses

Potyviruses

MANY POTYVIRUSES

(ssRNA, flexous rods)

Viruses

Potyviruses

1. Stylet-borne (nonpersistent) by many aphids
2. Narrow host ranges
3. Largest group of plant viruses

Viruses

Potyviruses

Primary inoculum scenarios

1. potato virus Y (Altiplano vs. lowlands)
2. cucurbit virus complex (stylet oils and economics)
3. lettuce mosaic (seed certification)
4. celery mosaic (isolate seedlings)
5. onion yellow dwarf (rogue volunteers)