Interesting, but what does this have to do with the real world of potato production? Now that transgenic potatoes containing Bt are moving out of the lab and into the field, there is the remote possibility that aphids might encounter delta-endotoxins in a plant, making transgenic plants less target-specific than originally thought. Or alternatively, plants could possibly be engineered to produce the specific endotoxins in the sap where the aphids would ingest it, thereby creating aphid-resistant plants.
Walters, F.S. and L.H. English. 1995. Toxicity of Bacillus thuringiensis delta-endotoxins toward the potato
aphid in an artificial diet bioassay. Ent. Exp. Appl. 77:211-216.