茶叶是人们日常生活中的良好饮料。但由于茶园病虫害不断发生,常使用化学农药防治,虽能保住茶叶高产增收,却也带来茶叶中的农药残留,不利人体健康。如果应用植物农药防治茶园病虫害,茶叶就不会有毒性残留,也不污染环境。现将几种可利用的植物介绍如下: 1.松针 用松针5千克,切碎捣烂,对水25千克,熬煮3小时后过滤,与400倍肥皂粉液混合使 Tea is a good drink in everyday life. However, due to the continual occurrence of plant diseases and insect pests in the tea plant, chemical pesticides are often used for prevention and control. Although they can keep the high yield of tea, they also bring pesticide residues in the tea and adversely affect human health. If the application of plant pesticides to prevent tea plant diseases and insect pests, tea will not have toxic residues, nor pollute the environment. Now available in several plants are described below: 1. Needle with pine needles 5 kg, chopped smashed, 25 kg of water, boil 3 hours after filtration, mixed with 400 times soap powder