The resistance tends to last only a few generations before the pest population evolves past it.
In areas where BT-Maize gets planted, Corn Ear Worm has been observed to evolve resistances in as few as 5 or 6 generations. You might think you've deployed a pest-free plant, but in reality all you've done is deploy an evolutionary pressure on the target population, and nature has had like 800-million years' practise out-evolving bad shit happening.
Viewed in a systems light, the whole notion is little more than a grift; at best a temporary solution that takes longer to develop than ecosystems take to out-evolve.
In areas where BT-Maize gets planted, Corn Ear Worm has been observed to evolve resistances in as few as 5 or 6 generations. You might think you've deployed a pest-free plant, but in reality all you've done is deploy an evolutionary pressure on the target population, and nature has had like 800-million years' practise out-evolving bad shit happening.
Viewed in a systems light, the whole notion is little more than a grift; at best a temporary solution that takes longer to develop than ecosystems take to out-evolve.