N. Bohorova et al., SUSCEPTIBILITY OF 4 TROPICAL LEPIDOPTERAN MAIZE PESTS TO BACILLUS-THURINGIENSIS CRYI-TYPE INSECTICIDAL TOXINS, Journal of economic entomology, 90(2), 1997, pp. 412-415
The relative susceptibility of 4 tropical maize pests, Spodoptera frug
iperda (J. E. Smith), Diatraea grandiosella Dyar, D, saccharalis (F.),
and Helicoverpa zea (Boddie), to the lepidopteran-specific CryI-type
proteins produced by B. thuringiensis is presented. The toxin with the
highest potency against H. zea larvae was the CryIAc toxin. S. frugip
erda larvae were susceptible to CryID and CryIF toxins. The CryIB toxi
n showed to be highly toxic against D. grandiosella and D. saccharalis
. This information will establish a basis for selecting B. thuringiens
is strains producing the appropriate CryI proteins to be used for the
biological control of these tropical pests.