The scientific or taxonomic name would be Zea mays.
The scientific or taxonomic name would be Dicentraspp.
The scientific or taxonomic name would be Dicentraspp.
The scientific or taxonomic name would be Agrostemma githago.
The scientific or taxonomic name would be Diabrotica sp.
The scientific or taxonomic name would be Ostrinia nubilalis.
The scientific or taxonomic name would be Diabrotica longicornis.
The scientific or taxonomic name would be Diabrotica undecimpunctata howardi.
The scientific or taxonomic name would be Zea mays var. Japonica.
Zea mays
A weed is a plant. There is no special biological taxonomic category for "a weed", just as there is no special taxonomic category for tree or bush. Each of these groupings is just an artificial classification that we have invented to help us describe plants that share certain characteristics. A weed can be regarded as any plant that is growing where it is not wanted. Therefore a rose in a corn field would be a weed.
Elaphe guttata guttataHerpetologists may also refer to the Corn Snake under the Latin name of Pantherophis Guttatus Guttatus, as there has recently been a discussion about the re-classification of the Corn Snake's Scientific name.
The corn plant produces corn. Or rather, corn produces corn.