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农作物在田里生长,总会受到一些昆虫的伤害,因为许多昆虫必需以植物为口粮。据科学家估算,全世界的农业,每年因虫害损失产量达14%～16%。在我国,每年的农业虫害要造成几百亿人民币的经济损失。当前的农业虫害防治,除少数试点的生态农业区和实验区外,大部分仍以化学农药为主。成百万吨的化学杀虫剂进入农业生态系统,不但污染了环境,还给地球生物圈的安全带来威胁。
Crops growing in the fields are always harmed by some insects because many insects must use plants as food rations. According to scientists’ estimates, the loss of pests in the world’s agricultural production amounts to 14% to 16% annually. In China, annual agricultural pests cause economic losses of several billion yuan. The current agricultural pest control, except for a few pilot eco-agricultural areas and experimental areas, is still dominated by chemical pesticides. Millions of tons of chemical pesticides enter the agricultural ecosystem, polluting the environment and threatening the safety of the Earth’s biosphere.