由于棚室内温度高、湿度大、光照弱、通风差,病虫害易发生。而化学防治效果显著、收效快、使用方便,要在生产中充分发挥化学防治的优点,克服其带来的污染、残留问题,做到安全、合理使用农药需从以下六个方面着手: As a result of shed high temperature, humidity, light weak, poor ventilation, pests and diseases prone. The chemical control effect is remarkable, quick, easy to use, to give full play to the advantages of chemical control in production, to overcome its pollution, residue problems, to be safe and rational use of pesticides from the following six aspects: