Pruning Fruit Trees

I have a Conference Pear tree in its third year. Last year it produced a lot of fruit. This year, little fruit more new growth. How and when should I prune.

Also I have, in their first year, a Victoria plum, with much growth a Cherry with much growth and a Braeburn Apple with about twenty apples and some growth. How and when should these be pruned.

Thank 

Neither cherries nor plums are pruned regularly. Both are large trees with long branches; you get the long branches even on dwarfing rootstock. Any pruning that has to be done is done in summer in a dry and sunny period.

Pears and apples are generally pruned in winter, instructions here.

Thanks Alina W