Pssst

Growing the best Thyrgodian Megga Chrisanthodil possible is the sole purpose of Robbie the Robot. When insects invade his garden, he has to stop them ruining his work. He has a canister of insect repellent, a smoke-bomb and a startling streamer, each placed on walls at the side of his garden. Each will stun any particular vermin, but you will need to find out exactly what kills what.