Difficulties with Death

Ethical Dilemma: How does one rid the darling broccoli of green caterpillars without having to actually murder the litte multi-legged herbivores?


Proposal A: I gather them gently into my hand, then rest them atop my compost heap. 
Ethical questions:  Will they survive? If they do, are they content? And why, then,  wouldn't they munch on my kitchen waste to start with? If they don't survive, is this a fate more cruel than pulvarising their internal organs instantanously upon discovery?


Proposal B:  I fling them as delicate projectiles onto the lawn, three metres south of the broccoli. 
Ethical questions: Do they simply crawl back to their spiritual green rooms? If they do, how long does it take? Is it a perilous journey? Do small birds or spiders eat them, therefore making this decision ethically balanced? 


Proposal C: I squish them between my fingers. 
Ethical questions: How would I cope with their lime juice innards all over my hands? Would the guilt of murder outweigh the sense of moral duty to the survival of the broccoli? 


Any suggestions folks? All kinds of hypothetically-posed, philosophically-leaning answers welcome....