How is papaya ringspot virus spread?
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.
How does papaya control viral disease?
- Thoroughly screen the nursery bed for the infected seedlings and rogue them carefully and transplant only healthy seedlings and remove the diseased plants in the main field.
- Spray with insecticides to check the sucking pests such as Aphids and Thrips which are transmitters of the viral disease.
How does papaya control mosaic virus?
Disinfect working tools or heat them in an oven at 150°C for 1 hour to kill the virus. Working tools or gloves can also be dipped in 0.525% sodium hypochlorite and then rinsed in water.
Is ringspot virus harmful?
Symptoms of PRSV manifest as a prominent mosaic pattern on the leaf lamina, wet-oily streaks on the petioles and upper part of the trunk, and the distortion of young leaves. PRSV is the most serious threat to papaya production in the world .
What process was used to very successfully combat ringspot virus infection of the Hawaiian papaya crop in the 1980s?
One of the most accepted theories on the mechanism was based on RNA (ribonucleic acid) silencing, which led to the development of transgenic papayas using RNA silencing to control the disease.
How do you treat papaya Ringpot virus?
There are no treatments for viruses. Since Papaya ringspot virus may have spread before the symptoms appeared, the focus should be on prevention such as using resistant crop varieties and eliminating weeds and aphids.
What is ringspot in plants?
What is Ringspot? Tomato ringspot virus is caused by a plant virus that’s believed to be transferred from sick plants to healthy ones through pollen and vectored throughout the garden by dagger nematodes. These microscopic roundworms live in the soil, freely moving between plants, albeit slowly.
How does papaya reduce root rot?
Drenching with Copper oxychloride 2.5g/lit of water or Bordeaux mixture 1% or Metalaxyl 1g/lit of water.
- Control incipient rots (less than 24 hours old) of harvested fruit by dipping fruits in hot water held at 120°F (48°C) for 20 minutes.
- Avoid damage or injury to papaya stems during cultivation.
How do you control the papaya leaf curl virus?
- Check for resistant varieties available.
- Do not grow alternative hosts in proximity of papayas.
- Avoid extensive insecticide use to favor beneficial insects.
- Uproot infected plants and destroy them.
- Be careful not to leave any plant residues after harvest.
Why was papaya genetically modified?
Papayas and GMOs Meant to be a way to create a virus-resistant plant against a common papaya virus, known as ringspot virus (PRSV), the initial idea was to make the plant safer.