Discussions about loss of effectiveness of head lice drugs containing pyrethrin or pyrethroid due to possible development of resistance are frequently published. However, in 2016, a randomized ...

Commonly known as the pyrethrum daisy (Tanacetum coccineum), this pretty flower contains a natural insecticide called ...

For the best experience, please enable JavaScript in your browser settings. Workers harvest pyrethrum. The number of farmers growing the crop has dropped to 10,000 ...