HYSHIELD’s unique formula is derived from exoskeletons of crustaceans. Chitosan, the active ingredient in HYSHIELD™, is extracted from crab shells, which are a by-product of the crab fisheries. Chitosan as a derivate of the naturally occurring compound Chitin, when given to plants helps activate the plant’s natural defense mechanisms fighting any potential diseases, pests and pathogens. HYSHIELD™ has been created with an environmentally sustainable approach in mind using crab and shrimp shells that would otherwise be discarded in landfills. Our innovative formula provides the necessary boost your plants require.