Provided is an insect control sheet using a polyhedrin protein polyhedron (Cry polyhedron) in which the insecticidal protein (Cry toxin) produced by Bacillus thuringiensis is fixed. The insect control sheet contains the Cry polyhedron, and is used by floating on water. The insect control sheet floats on the surface of water, and is obtained by layering a pure matrix layer (20) and a toxin-containing matrix layer (30) containing a Cry polyhedron (51) onto the undersurface of a sheet-shaped first sheet substrate (10). The pure matrix layer (20) comprises an easily decomposable or water-soluble second material, while the toxin-containing matrix layer (30) comprises the Cry polyhedron and an easily decomposable or water-soluble third material. The Cry polyhedron is gradually released from the toxin-containing matrix layer into the water on which the control sheet is floating.使用將蘇力菌(Bacillus thuringiensis)所生產的殺蟲蛋白質(稱為Cry毒素)固定化而成的多角體蛋白質多角體(稱為Cry多角體)的害蟲之防除片。害蟲之防除片含有Cry多角體，並浮在水上使用。片狀的第一基材片10的底面疊層有含有純基質層20與Cry多角體51之含毒素基質層30，並為浮在水面上的片材。純基質層20由易分解性或水溶性的第二素材構成，含毒素基質層30由易分解性或水溶性的第三素材與Cry多角體構成。Cry多角體從含毒素基質層緩慢釋放到浮有防除片的水中。
