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 ... pesticides that ...