夏季时节植物生长旺盛，病虫害也处于高发期，本期园艺热钱，园艺高手张崇炎要介绍一种安全环保的常见除虫剂——除虫菊 ...

In ancient Persia (current-day Iran), the natural insecticide Pyrethrum, made from dried Chrysanthemum flowers, was utilized ...