Why is bagging of the emasculated flowers essential during hubridization experiments ?

Bagging of emasculated flowers is carried out using

Bagging of emasculated flowers is carried out using

Emasculated flowers are bagged in order to:

Sertoli cells are very much essential during's spermatogenesis. Why?

Which is essential for flowering

Which is essential for flowering

Which is essential for flowering

Emasculation and bagging are the two important steps carried during artificial hybridisation to obtain superior varieties of desired plants. Explain giving reasons, in which types of flowers and at what stages are the two processes carried out.