gene cry1Aa from B. thuringiensis spp. kurstaki HD-1 was first crytype gene to be cloned. A total of 306 halotypes ofcry1 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 genecry1KfromB. thuringiensissubsp.
MorrisonBF190 has been cloned and sequenced. It has been reported selectively toxic toArfogeia rupaeand not active toP
xylostella.