In which technique, the removal of anthers from the bisexual flower bud takes place before the anther dehisce ?

Emasculation

The technique in which the removal of anthers from the bisexual flower bud takes place before the anther dehisces is called emasculation.

Emasculation is a technique used in plant breeding to prevent self-pollination. It is done by removing the anthers from the flower bud before they dehisce and release their pollen. This prevents the flower from pollinating itself, and allows the breeder to control the pollination process.

Bagging is a technique used to protect flowers from being pollinated by insects or wind. It is done by placing a bag over the flower bud before it opens. The bag prevents pollen from entering the flower, and ensures that the flower is pollinated by the pollen of the desired variety.

Grafting is a technique used to join two different plants together. It is done by cutting a piece of one plant and attaching it to another plant. The two plants then grow together, and the grafted plant becomes a single plant with the characteristics of both of the original plants.

Layering is a technique used to propagate plants. It is done by bending a stem of a plant down to the ground and covering it with soil. The stem then develops roots, and the new plant can be separated from the parent plant