Could zucchini yellow mosaic virus ZYMV be transmitted by seeds?
Importantly, ZYMV can be transmitted both horizontally by aphids and vertically by seeds, although the predominant method is by aphids in a non-persistent manner.
What does yellow mosaic virus do?
Zucchini yellow mosaic virus (ZYMV) is an aphid-borne virus that causes yield losses and fruit quality defects in cucurbit crops. ZYMV infects all cultivated cucurbit types including cucumber, pumpkin, rockmelon, squash, watermelon and zucchini. It does not infect other horticultural crops.
What is pumpkin mosaic virus?
Identifying Symptoms of Pumpkin Mosaic Virus Mottled leaves with areas of tonal differences in color. Shriveled, puckered, or contorted leaves. Deformed, warty, or bumpy pumpkins. Green or yellow stripes or blotches on mature pumpkins. Undersized fruit or lack of fruit development, especially toward the ends of the …
Which papaya species is resistant to distortion ring spot virus?
A successful case using genetic transformation to improve resistance against a disease is the case of transgenic papaya (Carica papaya) resistant to Papaya ringspot virus (PRSV). PRSV is a potyvirus that is primarily transmitted by aphids.
What is the mode of transmission of yellow vein mosaic of Bhindi?
Insects are the mode of transmission of Yellow vein mosaic disease. The whitefly insect is responsible for this disease. The disease is caused by the association of a DNA Beta satellite with a begomovirus.
What is the causative agent of yellow vein mosaic?
This disease is caused by a complex consisting of the monopartite begomovirus Bhendi yellow vein mosaic virus (BYVMV, family: Geminiviridae) and a small satellite DNA beta component. BYVMV can systemically infect bhendi upon agroinoculation but produces only mild leaf curling in this host.
How is rose black spot spread?
The black spot fungus produces spores which are released under wet conditions and usually spread by rain-splash. The disease can also be passed from plant to plant on hands, clothing or tools. Spores overwinter mostly on the shoots, but can survive on fallen leaves and within the soil.
What causes mosaic disease?
Mosaic viruses can be spread by weeds, infected seeds, an infected plant, or certain insects. Mosaic virus overwinters on perennial weeds and is spread by insects that feed on them. Aphids, leafhoppers, whiteflies, and cucumber beetles are common garden pests that can transmit this disease.
How is papaya ringspot virus transmitted?
Papaya ringspot disease is spread from plant-to-plant by aphids, which are small sap-sucking insects. There are many species of aphids that are capable of transmitting the virus.
What are the diseases of okra?
Okra.
What symptoms are caused by okra yellow vein mosaic?
Symptoms
- Yellowing of the entire network of veins in the leaf blade is the characteristic symptom.
- In severe infections the younger leaves turn yellow, become reduced in size and the plant is highly stunted.
- The veins of the leaves will be cleared by the virus and intervenal area becomes completely yellow or white.
What type of cells spread the rose black spot fungus?
It infects leaves and causes black or purple spots on the leaves. The rest of the leaves often turn yellow and drop off the plant. This reduces the plant’s ability to photosynthesise and therefore reduces growth. Rose black spot is spread by the spores of the fungus that are produced in the black spots.