papaya diseases and control pdf

1. How is papaya disease treated?
2. How can papaya virus be controlled?
3. What is papaya disease?
4. Why are my papaya leaves turning white?
5. Why are my papaya leaves curling up?
6. How can you tell if Papaya is bad?
7. How can papaya mosaic virus be controlled?
8. How is papaya ringspot virus spread?
9. Why is my papaya leaves turning yellow?
10. How many years will a papaya tree produce fruit?
11. Can you eat papaya with black spots?
12. Why is my papaya tree not fruiting?
13. How often should I water my papaya tree?
14. How do you treat powdery mildew?
15. Is a papaya a tree?
16. How do you treat papaya leaf curl?
17. What are white spots on papaya fruit?
18. When should you not eat papaya?
19. Why do papaya smell bad?
20. Why is my papaya bitter?

How is papaya disease treated?

Also, always sanitize tools to prevent the spread of diseases. Before papaya flowers appear or just as they appear, preventative fungicides may help control papaya anthracnose. Use a fungicide containing Copper hydroxide, Mancozeb, Azoxystrobin or Bacillus. Spray the orchard with the fungicide every two to four weeks.

How can papaya virus be controlled?

Like other potyviruses, PRSV is transmitted in a nonpersistent manner by several species of aphids. Genetically engineered (GE) papaya has been used to successfully control the disease caused by PRSV in Hawaii.

What is papaya disease?

Why are my papaya leaves turning white?

Powdery mildew is caused by the fungus Oidium caricae. The disease is easily recognized by the presence of a white, superficial growth on leaf surfaces. The disease begins as tiny, light yellow spots on the lower surface of leaves.

Why are my papaya leaves curling up?

Papaya leaf curl disease is caused by Papaya leaf curl virus (PaLCuV), a begomovirus naturally transmitted through whitefly (Bemisia tabaci). Main symptoms of papaya leaf curl disease are inward/outward curling of plant leaves, vein thickening, and stunted plant growth with small distorted fruits or no fruits.

How can you tell if Papaya is bad?

Here are the top signs you need to check for:

1. Dark spots over the entire papaya outer skin.
2. The appearance of molds inside or on the outer skin of papaya.
3. A sunken outer skin.
4. A bitter taste can also mean the papaya is bad.
5. Emits a rotten smell.

How can papaya mosaic virus be controlled?

Biological Control

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.

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.

Why is my papaya leaves turning yellow?

Papaya lethal yellowing is a disease caused by Papaya lethal yellowing virus (PLYV) that occurs only in Northeastern Brazil. The symptoms are characterized by progressive leaf yellowing and greenish circular spots on the fruits.

How many years will a papaya tree produce fruit?

The plants will continue to bear for many years, but yields usually decline as the trees age, and picking becomes difficult. In commercial production, fields are usually replanted or abandoned after three years.

Can you eat papaya with black spots?

Both the foliage and fruit of papaya may be infected with black spots. ... With fruit, the issue is primarily cosmetic and it can still be eaten, although in the case of commercial growers, is unfit for sale. The spores, black spots on the papaya leaves, are spread in wind and wind-driven rains from tree to tree.

Why is my papaya tree not fruiting?

Papaya plants in home gardens sometimes fail to fruit. ... It is a natural abortion of a female flower that had not been pollinated and therefore failed to develop into a fruit. Papaya plants occur in one of three sexual forms: male, female, or hermaphrodite. These forms are ex pressed in the plant's flower.

How often should I water my papaya tree?

Papayas need little water. They will, however, give more and bigger fruit if they are watered every 2 weeks in the dry season. If they are planted in clay soils, make sure that the soil does not stay too wet.

How do you treat powdery mildew?

Spray on plants every one to two weeks. Potassium bicarbonate– Similar to baking soda, this has the unique advantage of actually eliminating powdery mildew once it's there. Potassium bicarbonate is a contact fungicide which kills the powdery mildew spores quickly.

Is a papaya a tree?

The papaya plant is considered a tree, though its palmlike trunk, up to 8 metres (26 feet) tall, is not as woody as the designation generally implies. The plant is crowned by deeply lobed leaves, sometimes 60 cm (2 feet) across, borne on hollow petioles (leaf stalks) 60 cm long.

How do you treat papaya leaf curl?

There is no chemical treatment for viral infections. However, holding the population of whiteflies in check can reduce the severity of the infection. Soil application at the time of sowing and 4-5 foliar sprays of dimethoate or metasystox at an interval of 10 days can effectively control whitefly populations.

What are white spots on papaya fruit?

Powdery mildew infects papaya plants regardless of their age, but seedlings grown in greenhouses are especially susceptible, with apical tissues often destroyed. The disease frequently infects immature leaves but can also attack unripe fruits. The powdery mildew also appears on papaya petioles, pedicels, and peduncles.

When should you not eat papaya?

02/8​Can cause birth defects. Papaya leaves have a component called papain, which can be toxic for your baby if you are pregnant. It can even lead to birth defects. Not much is known about the side effects of papaya during breastfeeding, thus, it's best to avoid having papaya during and after pregnancy for some time.

Why do papaya smell bad?

Turns out, there's a scientific reason for why papaya stinks. Papaya is chock-full of an enzyme called papain, which according to the Enzyme Education Institute has a “pungent, somewhat offensive” smell and “unpleasant” taste. ... In many cultures, papaya is even used as a salt-free meat tenderizer.

Why is my papaya bitter?

When papaya is growing in the fields, its epidermis (outer layers of skin) gets cut, but the fruit keeps growing after the cut and it ends up changing its internal structure and texture, which brings in the bitter aftertaste in the fruit.