摘要
China is one of the countries in the world that is severely damaged by crop diseases,pests,and weeds.There are more than 1 700 species of agricultural pests occurring annually,53 of which are on the list of the 100 worst pests in the world(Chen and Wang 2014;Wu 2018).Currently,China is still greatly challenged by a growing problem of agricultural pests that th reate n the economy and health and pose ecological risks underthe conditions of global climate change,economic integration,crop structure adjustment and so on.Plant protect!on agai nst crop diseases,in sect pests and noxious weeds is necessary to ensure high-quality crop production and food safety.However,traditional strategies of plant protect!on have mainly involved chemical pesticides.
