All herbicides are pesticides. Pesticide is the umbrella term for herbicides, insecticides, fungicides, ect.

Agreed on BT plants. The funny thing about that one is that BT toxin is a common pesticide used in organic farming too (and all other farming) because it actually is so effective and non-toxic to vertebrates (hence why it was used to make the BT toxin producing plants in the first place). And yet the anti-GMO groups still fearmongered about the plants anyways, never seeing the hypocrisy in relation to what organic farming uses.