This amazing piece of information list provides about How to Care Ficus Benjamina and Pruning ficus branches, list of Basic Bonsai Styles

Bonsai defoliation, pruning leaves to to reduce leaf size

Bonsai defoliation involves cutting all the leaves of a tree during the summer. In doing so you force the tree to grow new leaves, leading to a reduction in the size of leaves and an increase in ramification. This technique should only be used on deciduous trees healthy enough to withstand this demanding technique. Defoliation can also be used to reduce growth in specific parts of the tree; you might for example defoliate the top part of the tree while leaving the bottom part untouched, in doing so you restore balance in the tree.

When to defoliate Bonsai?
For most tree-species June is the best month to defoliate, leaving enough time to grow new leaves and prepare for the winter season. The exact moment depends on the tree; defoliate after the new spring-growth has hardened off.

Which trees?
Most deciduous trees can be defoliated, but be sure to check this as some trees will not react well to this technique. Do not defoliate weakened trees (due to recent repotting, pruning or disease) or trees that are still in training.

Ficus Diseases and Pests

Ficus pests are mainly scale, mites and mealy bugs.
Ficus can be treated with soap sprays for most insect infestations.
Yellow leaves, sticky leaves, off color leaves and/or spider webs indicate insect problems.