Abstract: The subject invention concerns novel Bacillus thuringiensis strains containing parasporal proteins with pesticidal properties against whitefly, aphid, jassid, and possibly other sucking insects of agronomic importance, and peptide sequences to these proteins that can be used to obtain structural genes. The spores or crystals of these microbes, or mutants thereof, are useful to control hymenopteran pests in various environments. The genes of the invention can be used to transform various hosts wherein the novel toxic proteins can be expressed.