The subject invention relates in part to Cry34Ab/35Ab in combination with Cry6Aa. The subject invention relates in part to the surprising discovery that combinations of Cry34Ab/Cry35Ab and Cry6Aa are useful for preventing development of resistance (to either insecticidal protein system alone) by a corn rootworm (Diabrotica spp.) population. Included within the subject invention are plants producing these insecticidal Cry proteins, which are useful to mitigate concern that a corn rootworm population could develop that would be resistant to either of these insecticidal protein systems alone. Plants (and acreage planted with such plants) that produce these two insecticidal protein systems are included within the scope of the subject invention. The subject invention also relates in part to combinations of Cry34Ab/35Ab and Cry3Aa proteins "triple stacked" with a Cry6Aa protein. Transgenic plants, including corn, comprising a cry6Aa gene, cry34Ab/35Ab genes, and a cry3Aa gene are included within the scope of the subject invention. Thus, such embodiments target rootworms with three modes of action.