充分了解和掌握病虫害发生规律及传染途径,做到防重于治,科学、合理、安全使用农药,才能在病虫害防治方面取得明显效果。 We should fully understand and grasp the law of pest and disease occurrence and the route of infection so that we can achieve remarkable results in prevention and control of pests and diseases by using pesticides that are more preventive, scientific, rational and safe to use.