How can papaya mosaic virus be controlled?

How can papaya mosaic virus be controlled?

Affected fruits are small in size and malformed. Control : As soon as the disease symptoms are observed dusting Sulphur (30 g/10 litres of water) or spraying Calixin 75 EC (5 ml/10 litres of water) at 15 days interval helps to control the disease.

Which papaya is resistant to ringspot virus?

3.2 Genetic Transformation against Pathogens: Papaya Ringspot 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).

What does the papaya ringspot virus do?

Papaya ringspot virus infects papaya and cucurbits systemically. Symptoms on papaya are somewhat similar to those on cucurbits. In papaya, leaves develop prominent mosaic and chlorosis on the leaf lamina, and water soaked oily streaks on the petioles and upper part of the trunk.

Is it safe to eat papaya with ringspot virus?

PRSV-resistant transgenic papaya is environmentally safe and has no harmful effects on human health.

How can papaya disease be prevented?

avoid growing papaya on ground which had grown papaya in the previous season. plants are more tolerant to root rot as they age. Therefore transplant seedlings to the field some 6 months before the onset of the wet season to avoid this period of high disease pressure.

How do you stop mosaic virus?

How to Control Mosaic Viruses

1. Remove all infected plants and destroy them. Do NOT put them in the compost pile, as the virus may persist in infected plant matter.
2. Monitor the rest of your plants closely, especially those that were located near infected plants.
3. Disinfect gardening tools after every use.

How do I control TMV?

To control the spread of TMV, farmers must: wash their hands after handling infected plants. wash tools that have come into contact with infected plants in detergent or bleach. rotate the crops they grow in a contaminated field – they must not grow tobacco or tomato plants in the field for at least two years.

How does ringspot virus spread?

Papaya ringspot virus is transmitted from infected papaya trees to healthy trees by the feeding action of various species of aphids, especially the green peach aphid and melon aphid.

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.

Can mosaic virus live in soil?

Unlike TMV (tobacco mosaic virus), CMV is not seedborne in tomato and does not persist in plant debris in the soil or on workers’ hands or clothing. The occurrence of this virus is erratic and unpredictable; consequently, control of this disease can be difficult.

What kind of virus is the papaya ringspot virus?

Papaya ringspot virus(PRSV), a member of the aphid‐transmitted genus Potyvirus, is the cause of a destructive disease and a major limiting factor for papaya and cucurbit cultivation worldwide (Purcifull et al., 1984). PRSV is grouped into papaya‐infecting type‐P (PRSV‐P) and non‐papaya ‐infecting type‐W (PRSV‐W).

When did papaya ringspot disease occur in Hawaii?

This is the second time that papaya ringspot disease has occurred on Maui. In 1974, the disease was found in the Wailuku area of Maui but was eradicated by the end of 1975 through an intense roguing program. PRV was first reported to occur in the State on Oahu in 1945 and is widespread on the island.

What kind of disease does Papaya have in Florida?

Corynespora leaf spot is a recently de-scribed disease of Florida papaya, caused bythe fungus Corynespora cassiicola. It is a diseaseprimarily of the leaf blade but will occasion-ally occur on petioles and male flower stalks. Ithas not been observed on fruit or stems.

Why are the leaves on my papaya tree turning yellow?

Papaya ringspot is a destructive disease characterized by a yellowing and stunting of the crown of papaya trees, a mottling of the foliage (Figure 1), shoe-stringing of younger leaves (Figure 2), water-soaked streaking of the petioles (stalks), and small darkened rings on the surface of fruit (Figure 3).