Natural enemies is an important part of the biological control of pests.Panoramic view of the history of biological control of pests in the world,trichogramma are modern agriculture,forestry and the longest in the history of biological control of pests,applying the broadest,largest and Osamu best control for a class of natural enemy insects.Taxonomic study on the genus study on the biological control of pests in the world,the most widely used type of egg up to parasitic enemies,widely used for controlling maize,rice,cotton,vegetables,and forest pests.Many scholars at home and abroad for their biological and ecological characteristics of a large number of basic research,laying a theoretical foundation for application trichogramma controlling pests in agriculture and forestry.
Leader leaf moth (Spilonota lechriaspis Meyrick) for Apple are important pests in fruit trees.Shoot great harm to fruit trees.In recent years about the comprehensive treatment of biological control of pests,insecticide resistance development and governance,such as,has made a large number of both typical and universal significance of the research results.Controlling leaf rollers on Leader rely mainly on the effects of chemical pesticides.But a huge amount of leaf rollers on cost control and top tip resistance of high growth,so that their work prospects.At present,the Leader of leaf rollers on existing pesticides has had a different level of resistance.Emergence of resistance,chemical control of eco-environment problems and the failure of consideration,more and more researchers around the world are looking for comprehensive management of leaf rollers on effective Leader and new approaches to non-chemical control.
In many follows,different follows foliaceous moth to top tip differences between the parasitic effectiveness.In top tip follows control foliaceous moth practical application,the types and release follows the density on the control effect buzzers influential.Density is too small,cannot achieve ideal control effects of excessive,can produce the density of waste increase costs.So it is necessary to select fine bees and research such a reasonable density follows.This thesis on this idea and research is conducted on the basis of research on top of,follows seeketh foliaceous moth eggs and meters the moth eggs selectivity and selective parasitic effectiveness of top tip,foliaceous moth parasitic efficiency high in different than follows on PE against top tip foliaceous moth eggs,through the parasitic rate follows merely foliaceous moth parasitic top tip for the eggs,the ability to choose the best benefit release follows on this than provides the basis.