I would agree with Bob regarding Codling moth being the problem.
Sawfly affects the young fruitlets and causes a scar on the fruit - a
russetted line across it whereas the codling moth lays its egg in the
blossom end of the fruitlet, the maturing maggot eating out some of the
middle and emerging out the side of the fruit.
A useful means of control is a double header approach of in the autumn
using grease bands to stop the females climbing the tree - re-frersh in
the spring. The second approach is to use pheromone traps, available
from the garden centers or direct from Agralan -
http://www.agralan.co.uk/acatalog/On...ONTROL_11.html
If you have neighbouring gardening that are infected - you are on the
back foot - could try and encourage them to do the same. Commercially
they put one trap every 5m, if the get over 25 codling moths in the
trap, they would spray.
Good hygiene is important - pick up and dispose of windfalls. If you
want them for the birds move them well away. If you have an ornamental
crab such as Golden Hornet, which seems to hold onto its fruit forever
- birds don't go mad for them, be sure to clear them too, just incase
they are providing a breeding pool
Clifford
Bawtry, Doncaster, South Yorkshire