TAMMY: Pyrethrum is a natural insecticide, made from plants in the now-obsolete genus of daisies that included chrysanthemums and tanacetum. The active chemicals in these plants are called ...

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 ...

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But there's more to these flowers than meets the eye. They are a source of pyrethrum, a key ingredient in natural insecticides, making them a gardener's ally against pests. The Painted Daisy ...