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close this bookTrees and their Management (IIRR, 1992, 195 p.)
View the document(introduction...)
View the documentMessage
View the documentProceedings of the workshop
View the documentList of participants
View the documentCurrent program thrusts in upland development
View the documentTrees and their management
View the documentSustainable agroforest land technology (Salt-3)
View the documentOutplanting seedlings
View the documentTree pruning and care
View the documentBagging of young fruits
View the documentEstablishing bamboo farms
View the documentPhilippine bamboo species: Their characteristics, uses and propagation
View the documentGrowing rattan
View the documentGrowing anahaw
View the documentGrowing buri
View the documentShelterbelts
View the documentBank stabilization
View the documentAssessing the usefulness of indigenous and locally adapted trees for agroforestry
View the documentA guide for the inventory, identification and screening of native plant species with potential for agroforestry
View the documentFruit trees for harsh environments
View the documentCitrus production
View the documentJackfruit production
View the documentMango production
View the documentMiddle to high understory shade tolerant crops
View the documentLow understory shade-tolerant crops
View the documentConserving available fuelwood

Jackfruit production

VARIETIES

There are no standard horticultural varieties for commercial production. The Torres jackfruit, a recent selection of the U.P. at Los Ba is now being popularized. The Department of Agriculture in Central Visayas has also selected several promising jackfruit varieties.


Varieties

PLANTING MATERIALS

Seedlings are still widely used but they do not come true to type. Grafted trees make better planting materials.

ADAPTATIONS

Jackfruit grows well on all climatic types although warm and moist surroundings are best.

LAND PREPARATION

Prepare the land for planting before the onset of the rainy season. For flat to gently rolling lands, plow the field once and harrow two or more times. These operations are dispensed with in very hilly areas.

PLANTING

Plant at the onset of the rainy season. The suggested planting distance for jackfruit in flat to gently rolling lands is 8-10 m. In hilly areas, adjust plant spacing according to the slopes of the land.

TRAINING AND PRUNING

Not much is known about training young jackfruit trees. But since the fruiting stalks are produced on the trunk and large branches, train the young trees to develop as many primary and secondary branches close to the ground as possible. Once this is attained, limit pruning to the removal of interlacing interior branches and diseased twigs.

IRRIGATION

Irrigate young jackfruit trees during summer. If water is readily available, continue this practice throughout the life of the trees.

FERTILIZATION

Jackfruit trees are seldom fertilized. They would grow better and produce more fruits if they are fertilized in some way. To avoid additional expense or at least reduce the need for inorganic fertilizers, apply organic materials instead. Mulching around the trunk throughout the year would substitute for fertilization.

CONTROL OF PESTS

There is no serious disease that attacks the jackfruit. However, fruit flies are very serious pests. This is effectively controlled by wrapping the fruits while still young with any of these materials: sacks, made of any material, used cement bags, leaves of coconut or banana and rice straws.

HARVESTING

The fruit is usually harvested before it ripens on the tree. A mature fruit produces a hollow sound when its spiny peel is tapped with the fingers.