What causes the Cadang Cadang disease of coconut?

What causes the Cadang Cadang disease of coconut?

Cadang-cadang is a disease caused by Coconut cadang-cadang viroid (CCCVd), a lethal viroid of coconut (Cocos nucifera), African oil palm (Elaeis guineensis), anahaw (Saribus rotundifolius), and buri (Corypha utan) palms.

What are the coconut diseases?

This article is a list of diseases of coconut palms (Cocos nucifera)….

Fungal diseases
Algal leaf spot Cephaleuros virescens
Anthracnose Glomerella cingulata (Colletotrichum gloeosporioides, anamorph)
Bitten leaf Ceratocystis paradoxa (Chalara paradoxa, anamorph)
Bipolaris leaf spot Bipolaris incurvata

What is the propagation of coconut?

Coconut is propagated through seedlings raised from selected seednuts. Generally 9 to 12 month old seedlings are used for planting. Select seedlings, which have 6-8 leaves and 10-12 cm collar girth when they are 9-12 month old. Early splitting of leaves is another criteria in the selection of coconut seedling.

What causes holes in coconut trees?

Coconut rhinoceros beetle adults affect palm trees by chewing big holes through their growing leaves to feed on soft tissue in the heart of the palm.

What kills coconut trees?

The fungus Ganoderma sonata causes ganoderma root, which can injure many species of palm trees by feeding on plant tissue. Older fronds begin to droop and collapse while new fronds will be stunted and pale in color. There is no chemical control for this disease, which will kill palms in three years or less.

How do you control Eriophyid mites in coconut?

Apply urea 1.3 kg, super phosphate 2.0kg and muriate of potash @ 3.5 kg/palm/year. Increased quantity is recommended to increase the plant resistance to the mite. Soil application of micro nutrients like, Borax 50 g + gypsum 1.0kg + Manganese sulphate 0.5 kg/palm/ year TNAU Micronutrient solution 200 ml/tree.

How do you control the rhinoceros beetle in coconut?

Cut stumps as close to the soil surface as possible. A hooked wire can be used to extract and destroy rhinoceros beetle adults feeding in coconut trees. Place phorate 10 G 5 gms mixed with sand in two inner most leaf axils for 2 times at 6 months intervals.

How do you get rid of Eriophyid mites?

Use chemical measures. If a plant is small and can be easily treated, spraying with a miticide in early spring at budbreak may provide some protection. Since eriophyid mites can have numerous generations a year, follow-up sprays may be needed.

How do you increase the yield of a coconut?

Coconut responds well to summer irrigation i.e. summer irrigation @ 40 litres per palm per week will increase the yield of nuts by 50%. Under basin irrigation, 200 litres per palm once in four days will be beneficial. In areas where water is scarce drip irrigation system can be adopted.

How many times coconut trees bear fruit?

On fertile soil, a tall coconut palm tree can yield up to 75 fruits per year, but more often yields less than 30. Given proper care and growing conditions, coconut palms produce their first fruit in six to ten years, taking 15 to 20 years to reach peak production.

What month are coconuts ripe?

Six or seven months after the fruits emerge, the inside of the coconut contains mostly water, which you can harvest and drink. Over the next five or six months, the water converts to the white nut meat lining around the inside of the shell. The coconut should be fully ripe at 12 months after fruits emerge.

What is the lifespan of coconut tree?

about 60-70 years

Do coconut trees need a lot of water?

Water the coconut palm once a week, unless there is sufficient rainfall. Your palm tree needs at least one inch of water per watering, especially if it was recently planted.

How deep are the roots of a coconut tree?

Coconut roots usually grow to a depth of close to 0.80 m with 60-90% found in the top 0.5 m of the soil.

What is the highest of an average coconut tree?

Coconut trees can be dwarf and tall. Dwarf coconut trees can reach 20 to 60 feet in height, while tall coconut trees grow to the height of 98 feet. Coconut tree has 13 to 20 inches long pinnate leaves. Leaflets have lanceolate shape.

How much does coconut yield?

Yield varies from region to region (3 500 to 6 000 nuts/ha/year), which is due to a number of factors. One tree may yield on average 70-100 nuts to a maximum of 150 nuts per year. The kernel (copra, coco-water and shell) comprises 65 per cent of total weight, while the husk contributes 35 per cent.

Do coconut trees stop growing?

The tree continues to fruit until it is about 80 years old, with an annual production of 50–200 fruits per tree, depending on cultivar and climate. The fruits require about a year to develop and are generally produced regularly throughout the year.

What is the planting distance of coconut?

A spacing of 6.5 x 6.5 m is optimum for dwarf variety. For planting in field border as a single row, adopt 20′ spacing between plants….Coconut Main Field (Cultivation Practices)

Planting system Spacing Approximate number of plants/ha
Double hedge 5 x 5 m in rows 9 m between pairs of rows or 6.5 to 6.5m in rows – 9m between pairs of rows* 280

Why do coconut trees need salt?

The application of sodium chloride (NaCl) or common table salt can effectively control this problem. Its addition to chlorine deficient ‘Tugbok’ soil (Typic Tropudalfs) planted to local tall, ‘Laguna’ coconut trees increased nut production, copra weight/nut, and copra yield/tree.

Which is the best fertilizer for coconut?

Nutrient Management :: Coconut. From 5th year onwards, apply 50 kg of FYM or compost or green manure. 1.3 kg urea (560 g N), 2.0 kg super phosphate (320 g P2O5) and 2.0 kg muriate of potash (1200 g K2O) in two equal splits during June – July and December – January.

Which type of soil is best for planting rice?

riverine alluvial soil

Does Rice need good soil to grow?

Whether you choose to flood your rice or just irrigate it, water is probably the biggest concern when choosing a plot. Make sure it’s an area you can easy water because of its irrigation needs. Rice also does best in fertile, nitrogen-rich soil.

Which soil drains water easily?

Sandy soils are also known as the light soils due to their high proportion of sand and little clay. These soils have quick water drainage properties and are easy to work with.

Which soil has highest percolation rate?

sandy soil

What is an acceptable percolation rate?

For soils to effectively treat effluent, percolation rates must be between 10 and 60 minutes per inch of percolation. You need at least 20 to 21 hours to do a standard percolation test requires. This creates a worst-case scenario in the soil.

Which soil has highest water holding capacity?

  • The water holding capacity of a soil is a very important agronomic characteristic.
  • The water holding capacity is highest in clayey soil because it is made up of very small tightly packed particles that do not allow water to percolate.
  • Hence The water holding capacity is the highest in Clayey soil.

How do you remove percolation rate?

The percolation rate can be calculated by the amount of water should be divided by total time taken to percolation. Complete answer: The phenomenon of absorption of water by soil is considered as percolation.

What is a percolation rate?

The soil percolation rate indicates how quickly water moves through soil and helps evaluate the ability of the soil to absorb and treat effluent — wastewater that has received preliminary treatment in a septic tank. The percolation rate is measured in minutes per inch (mpi).