In what way to control asthma without medicine

Backward bending asana, badda padmasana and pada hastasana.

Sarvangasana, marjariasana, suptavajrasana, hastauttasana, ustrasana.

Shavasana through breathing awareness.

Deep abdominal breathing at all intervals.

Pranayama: Nadi sodana, kapalabati, bhastrika.

Asthma is psychometric illness so practice yoga nidra.