Pests are the major enemy of agriculture and forestry production. It is reported that they cause staggering economic losses, reaching 250 billion dollars per year on a worldwide basis. They are also one of the primary reasons for significant yield losses in China. In order to control pests, farmers have to apply pesticides extensively, which not only elevate costs tremendously, but pose a crippling threat to mankind and the environment. Therefore, cultivating strains with strong resistant to pes...