据有关调查材料表明，长期以来，我国农作物由于病虫害和杂草的危害，每年损失粮食占总产量的５０％，使用化学农药能挽回１５％，但农药的残留对环境的污染和人畜的健康带来了威胁。如何除弊兴利呢？就务必加强管理，科学使用，加速研制开发高效、低毒、低残留的农药新品种，重点发展生物农药，以达到保护环境，不危害人畜健康和促进农作物高产增收的目的。 According to the survey materials, for a long time, due to pests and weeds damage to crops in our country, annual loss of food accounted for 50% of the total output, the use of chemical pesticides can save 15%, but pesticide residues on the environment pollution and health of people and animals with Threatened How to eliminate disadvantages? It is imperative to strengthen management and scientific use and speed up the research and development of new pesticides with high efficiency, low toxicity and low residue, and focus on the development of biological pesticides so as to achieve the goal of protecting the environment, not endangering human and livestock health, and increasing the yield of crops.