Here's Toxic Moth and here's his Toxic Spray.
Here's a Batling behind the Toxic Moth.
Here's a shot of the 3 Rangers holding up Red.
The 3 Rangers send Red flying towards Toxic Moth while the Red Ranger has the top part of his blade sticking out in the monster's direction so that when he comes towards the monster, the blade stabs right into him. This is what destroys him.
Here's Giant Toxic Moth.
Here's the Toxic Moth fighting the Lightspeed Megazord.
The Lightspeed Megazord's Saber's Fiery Finisher is what destroys the Giant Toxic Moth.