gene cry1Aa from B. thuringiensis kurstaki HD-1 was first crytype gene to be cloned. A total of 306 halotypes of cry1 protein toxins have been reported. Different Cry proteins are toxic to different types of insect orders. Cry1 proteins are toxic to lepidopteron insects and coleopteran insects.Cry1Ie protein has been shown to be toxic toPlutella xylostella, Ostrinia fur-nacalis, and the soybean pod borerLeguminivora glycinivorella. A novel crystal protein gene cry1K from B. thuringiensis sub sp.Morrison BF190 has been cloned and sequenced. It has been reported selectively toxic to Arfogeia rupae and not active to
Pxylostella.