When pineapple plant matures to have about 40 leaves, flower inducing growth regulator can be applied. If anyone about ethylene application (not as ethephon) in pineapple plants please share the idea.
Pineapple is a non-climacteric in nature , therefore , application ethylene gas or ethephon as a sourceof ethylene may not be advisable. However, it is extensively used for induction of flowering in pineapple.