A bag of polythene butter paper, when applied to emasculated flowers
(which are in the bud stage), prevents pollen contamination of its stigmas.
Emasculated flowers can be removed from their buds and stuffed into a bag of
butter paper before anthesis. A pre-sterilized brush is used for dusting the stigmas
of mature emasculated flowers with pollen grains of desired male plants. Flowers
are then re-bagged until the fruits are formed. Artificial hybridization uses this
technique primarily. Plant breeders use this technique to prevent unwanted pollen
grains from contaminating the stigma of flower