Anthers are removed before they dehisce from the flower of the female plant if it is bisexual. This step is referred to as emasculation. There is no need to remove the anthers if the flower is unisexual. The   flowers are then covered with a bag of suitable size, generally made up of butter paper, to prevent contamination of its stigma with unwanted pollen. This process is called bagging.

Advantages of bagging technique

1. It is necessary for cross-breeding and to prevent pollination by unwanted species in plant breeding.

2. Commercially superior hybrid varieties can be obtained by cross pollination of different useful species.

3. It helps to avoid inbreeding depression caused by self pollination.