Silkworm pupae  A natural food source bait additives, highly rich in protein and nutrients, they have a wide variety of uses.Simply add to your Ground baits, Method Mixes and Stick Mixes enabling you manipulate the breakdown times of your mixes with highly active fish attractantshave.  Silkworm pupae have been said to be especially beneficial in the growth and colour enhancement of Koi Carp. They also provide better slime coat protection to resist parasite and bacterial infections resulting in a better, bigger, healthier fish