The present invention relates to a DNA construct containing a DNA for a serine
proteinase inhibitor isolated from Brassica oleracea, which has antibiosis
activity. The present invention also relates to transgenic plants and transgenic
plant seeds containing that nucleic acid molecule. Resistance to herbivorous insects
can be conferred to a plant by either transformation of the plant with the nucleic
acid molecule which encodes a serine proteinase inhibitor isolated from Brassica
oleracea or by application of that inhibitor to plants or plant seeds.
