At the source, pollen emission depends on biological
processes that must occur within the plant before pollen is
emitted. Corn plants are monoecious, i.e. they have male and
female flowers on the same plant. The male floral structure
called the tassel is partly shown in Fig. 1. It is located at the top
of the plant and contains a few hundred to a thousand
spikelets; each spikelet supports two male flowers that
contain three anthers each. Once anthers are extended,
pollen emission is initiated by desiccation of the anther tip