夏日,江南的庭院,人们常常看到一簇簇“野菊花”。它从基部抽出深裂的羽状绿叶,叶上覆有白色的绒毛;高高的枝顶开满密密的小花。冷眼望去,仿佛是翠羽满身的小鸟高举花束展翅欲飞。这就是大名鼎鼎的杀虫能手——除虫菊。盛花期之前,采收八成开放的鲜花,晾晒干燥后粉碎,按1:300的比例加水即可用于防治果树、蔬菜、棉田的虫害。这种除虫方法使用安全,不污染环境,对作物无残毒,对人畜无害。 Summer, the south courtyard, people often see a cluster of “wild chrysanthemum.” It pulls out from the base of a deep split pinnately green leaves, leaves covered with white fluff; tall branches covered with dense flowers. Cold look, as if Cui Yu covered with birds flying in the air to fly. This is the famous insecticide - pyrethrum. Before the full flowering period, 80% of the open flowers are harvested, dried in air, crushed, and then added to water at a ratio of 1: 300 to control pests in fruit trees, vegetables and cotton fields. This insecticidal method is safe to use, does not pollute the environment, has no residual effects on crops and is harmless to humans and animals.