This document discusses physiological disorders in amla (Indian gooseberry) trees, including internal fruit necrosis caused by boron deficiency. The internal necrosis starts with browning of the inner mesocarp tissues during endocarp hardening, which then extends outward and results in brown or black areas on the fruit surface. Severely affected fruit can have black, corky mesocarp with gummy pockets. The recommended treatment is to spray trees with 0.6% borax solution three times at monthly intervals in September and October. Unfruitfulness in amla is also discussed, which is often due to a lack of female flowers rather than pollination issues.

2. Amla Physiological Disorders
A
Lecture To ToT trainees ( FFS)
By
Mr. Allah Dad Khan
Provincial Coordinator IPM KPK
MINFAL Pakistan

3. INTERNAL FRUIT NECROSIS INTERNAL
In this disorder, necrosis symptoms start with
browning of innermost part of the mesocarpic tissues
at the time of en do carp hardening in the second and
3rd week of September; Browning of mesocarpic
extends towards the apocarps resulting in brownish
black areas on the fruit surface in the second and
third week of October. Depending upon the severity
of the disorder, mesocarpic of the affected fruit turns
black and becomes corky and gummy pockets
develop.
This disorder has been reported to be due to the
deficiency of boron for which spray of 0.6 % Borax
thrice in the month of September and October at
about 10-15 days interval is recommended to control
the disorder.

4. Like other fruits such as mango, apple, etc.
unfruitfulness is a problem in aonla
orcharding too. This problem is more
pronounced in the variety, ‘Banarasi’. Studies
have indicated that this problem is not due to
lack of pollination as often believed, but it is
largely due to absence of female flowers in
the tree.
Unfruitfulness in amla

5.  BoronDeficiency
SymptomsFruit necrosis which
begins with the browning of inner
most part of the mesocarpic
tissues at the time of endocarp
hardening. This is extended
towards the epicarp resulting into
brownish black areas on the fruit
surfaces depending of the
severity of the disorder,
mesocarp of affected fruits turns
black from brown which later
turns into corky and gummy
pockets.
 Correction MeasureSpray of
Borax 0.6% thrice at monthly
intervals.