|
Prior to planting, the field should be deeply
ploughed, harrowed and leveled. The pits above 1 metre cube
should be dug during May-June at appropriate distance and
after 15 to 20 days of exposure to sun are filled with surface
soil mixed with 10 to 15 Kg of decomposed farm yard manure.
If depressions take place in the pits with the onset of rain,
more soil should be added.
Propagation Material
Aonla plant has long been raised from seed
and used as rootstock. The seeds attain full maturity by February
for which they should be sown in the last week also for getting
higher percentage of germination. The best results were obtained
by sowing at the commencement of rainy season and subsequently
weeding regularly.
Artificial Propagation
The ripe fruits are collected in January and
dried in sun, seeds dehisce and are swept up and cleaned by
winnowing. It is desirable to use fresh seed as the seeds
donot retain viability for long. The seeds need hot water
(80°c) treatment for 5 minutes to hasten germination which
takes about 10 days.
Planting
Healthy grafts or budded plants are planted
during rainy season preferably during the early monsoon in
July with square system.
Transplantation
Seedlings of 5 - 10 cm.s height are picked
out in polythene bags in the evening. Plants are transplanted
in the field in the second year.
Spacing
Best results are obtained under a spacing
of 4m x 4m.
Vegetative Propagation
Selected varieties are vegetatively. propagated
by budding, in arching or by rooted cutting. These plants
start fruiting in 5 - 6 years. Budding has been found to be
most practical and shield budding is the commercial method.
The most important factor is proper selection of mother plant
which is highly fruitful and the bud should be taken from
such a branch which has good number of female flowers.
Irrigation
The young plants require watering during summer
months at fortnightly interval, particularly till they have
been fully established. Watering of mature, bearing plants
is also necessary from April to June at bi-weekly interval
to secure higher fruit set and reduced fruit drop. Irrigation
during October to December at 20 days interval helps in better
development of fruits.
Manuring
The young plant should be given 15 - 20 kg
of well rotten farmyard manure and the mature tree 30 to 40
Kg each year during September - October. Every mature tree
should also be fertilized with 1Kg Super phosphate and 1-1.5
Kg muriate of Potash. The above fertilizers should be given
in two equal split doses to mature, bearing tree, once during
September-October and again during April-May. After setting
of fruits the plant needs to be irrigated after fertilizer
application.
Disease and Pest
Aonla rust (ravenellia emblica) - spraying
z - 78 at 0.2%
Blue mold - (Pencillium islandicum) Weak Borax or Sodium Chloride
Rotting- (Pencillium oxalicum & Asperigillus niger)
Bark eating caterpillar (Indarbela Sp.) Spraying
0.03% Endrin or injecting Kerosene oil or petrol in the holes
and plugging them with cotton or wet soil during September
- October.
Shoot gall maker (Bethusa stylophora) - Spraying 2% parathion
is suggested to kill the larvae.
Weeding
The seedling or vegetative saplings require
clean weeding, soil working for about two years for successful
establishment and fast growth.
Harvesting
Aonla has been usefully cultivated and many
varieties such as Banarasi, chakaiya, Hathijhol and Bansi
red have been developed which have useful properties. Aonla
plants start bearing quite late usuallt after 4-5 years. The
fruits are light green at first, but when they mature the
colour becomes dull, greenish yellow or brick red. Best time
of harvesting aonla fruits is February when the fruits have
maximum vitamin content.
Yield
A full grown grafted aonla tree with good
bearing habit yields from 187 to 299 kg fruit per year. Average
fruit yield is 200kg per grafted tree.
Economics
The demand of aonla fruit by various commercial
pharmaceutical companies has taken an upward swing and there
is enough incentive for tribals to collect the fruit. The
average price offered for green fruits is Rs3 to 4 per kg.
Panna aonla is famous for its bold size and absence of fibres.
|
