A few days ago, the "A group of cockroach disease resistance growth promoting agent and its preparation method and application" invented by Liu Bo and Xie Jun of the Aquatic Diseases and Feed Research Laboratory of the Freshwater Fisheries Research Center won the national invention patent authorization. The patent number is: ZL2013 1 026334.1. The invention belongs to the technical field of aquatic compound feed additive, and mainly comprises mixing and pulverizing the components of gallnut extract, potassium diformate, L-carnitine and carrier to prepare a dry powder. The raw material of the invention has stable source, simple preparation, wide material extraction, low cost, can improve the immunity and anti-oxidation ability of the fish body, improve the infection ability of the head cockroach against Aeromonas hydrophila, and can promote the growth of the head lice. Mains Electricity Garden Light Mains Electricity Garden Light,Single-Head Reliable Garden Lamp,Triple-Head Garden Lamp,Lotus Outdoor Garden Lamp Jiangsu chuanglv Transportation Facilities Co., Ltd , https://www.clsolarlights.com