The rubbing only increased serotonin levels and 4-3 hours later after that boost, they transform. So if you was to increase their serotonin levels via other means, you would still only turn grasshoppers into locusts. Yes locusts metabolism in faster, so they are more veracious.
As a form of terrorism, well you would still need to bread and or/find a huge swarm of grasshoppers and if you found such a size large enough, they would already naturally be swarming. Though the prospect of some terrorist group breaking grasshoppers has an edge of Chris Morris about it that bemuses me.
Fascinating that it is related to serotonin! I wonder if an antagonist would prevent the behaviour? Might be challenging to dose large numbers of locusts.
Maybe target them with commercials for pro-depressants? Feeling restless, gregarious, like you just might take ravenous flight? Ask your locust doctor if pro-depressants are right for you.
Then we just need some sexually attractive locusts to lobby the locust doctors and problem solved!
As a form of terrorism, well you would still need to bread and or/find a huge swarm of grasshoppers and if you found such a size large enough, they would already naturally be swarming. Though the prospect of some terrorist group breaking grasshoppers has an edge of Chris Morris about it that bemuses me.