Abstract: Disclosed are a grain boundary and surface-doped rare earth zirconium-based ceramic material and a preparation method and application thereof, and part of doped elements are positioned at the grain boundary and surface of the rare earth zirconium-based ceramic material by a step-by-step doping method. The sintering activity of the rare earth zirconium-based ceramic material can be changed by adjusting the type and content of doping elements at the grain boundary and the surface, thereby enabling the control of the grain size and the grain boundary number and characteristics of the rare earth zirconium-based ceramic material, and finally optimizing the properties, such as electrical and mechanical properties, of the material. The doping method has the advantages of simple process, low cost and high universality, and can meet the requirements of different rare earth zirconium-based ceramics on doping elements, and thus is suitable for large-scale application.

Abstract: The present invention provides a method for controlling Conogethes punctiferalis, which comprises contacting Conogethes punctiferalis with Cry1A protein. The present invention achieves the control of Conogethes punctiferalis by enabling plants to produce Cry1A protein in vivo, which is lethal to Conogethes punctiferalis. In comparison with current agricultural and chemical control methods, the method of the present invention can control Conogethes punctiferalis throughout the growth period of the plants and provide the plants with a full protection. Additionally, the method is stable, complete, simple, convenient, economical, pollution-free and residue-free.