Jack (Artocarpus heterophyllus)
Moraceae

Varieties
Velipala, Singapore, Hybrid jack, Panruti selection, Thanjavur jack, Burliar 1, PLR 1, PLR (J) 2 and PPI 1 are the popular varieties in jack.

Soil and climate
Deep well drained soil is necessary for jack cultivation. Soil pH around 5.5 at the time of planting is desirable. Otherwise treat the soil with 1% Aluminium sulphate in the pit to reduce the pH. The crop comes up well in the plains and up to an elevation of 1200 m.

Propagation
Soft wood grafting: Large scale propagation of jack can be done by cleft grafting during July-August on 4 month old seedling rootstock

Preparation of field and planting
Dig pits of 1 m x 1 m x 1 m. Fill up the pits with top soil mixed with 10 Kg of FYM and 1 Kg of neem cake per pit. Plant preferably grafts during June – December at 8 x 8 m spacing.

Irrigation
Once in a week till the plant gets established. Thereafter irrigation is given as and when necessary.

Manures and fertilizers
The manures and fertilizers should be applied in two splits during May - June and September - October.

Plant protection
PestFruit borer: Apply Carbaryl 50 WP @ 2 g/lit.

(a) jackfruit severely infested with jackfruit fruit borer (b) immature larvae on the fruit surface (c) larvae inside the tunnel in infested fruit tissues

Spittle bug
Spray methyl parathion 50 EC 2ml/lit or Methyl demeton 25 EC @ 2ml/lit. or Phosphamidon 40 SL 2 ml/lit or dust Methyl parathion 2 D or Quinalphos dust 1.5 D. 

Disease
Rhizopus rot
Spray 1 % Bordeaux mixture or Copper oxychloride 2.5 g/lit. Three sprays must be given at 15 days interval.

Rhizopus rot

Harvest
The yield commences from 5th year in grafts and 8th year in seedling trees.  Harvest is done during March-July.

Yield
The crop yields about 30-40 t/ha

Market information

Source
1. http://www.ctahr.hawaii.edu/nelsons/Misc/1_jackfruit_rhizopus_rot_1.JPG