This paper discusses the relations between a 2-harmonic submanifold and aminimal submanifold with isotropic second fundmental form in Sn+p and obtains thepinching conditions on the second fundmental form and the Ricci curvature for compact 2-harmonic submanifolds in Sn+p.

In this paper,we prove that two types of isotropic totally real submanifolds with flat normal bundle in a complex projective space must be minimal.

Sex pheromone-mediated monitoring and mating disruption of C.

The paper showed a parameter representation of isotropic vector in complex vector space, and obtained the some properties.

Field experiments for controling the tea tussock moth,Euproctis pseudoconspersa,by mating disruption with sex pheromone.;

Control effect on diamondback moth,Plutella xylostella,with sex pheromone by mating disruption in cabbage field at high mountain;

Using Sex pheromones control pests are effective methods in nuisance less agriculture production, The experiment of Mating disruption of confuser-A introduced from Japan control apple major pests include Carposina niponesis, Phyllonorycter ringonella heparana and Adoxophyes orana fasciata, in one year or two years.