Method for the determination of pyrethrins residuesin cereals for export 出口糧谷中天然除蟲菊素殘留量檢驗方法
Pyrethrins and pyrethroids are usually applied as space spray i . e . by fogging to kill mosquitoes in contact 擬除蟲菊酯通常以噴霧方式作空間處理,直接殺死接觸到藥霧的蚊子。
Natural pyrethrins is a botanical insecticide made from extracts of chrysanthemum flowers while pyrethroids such as s - bioallethrin , cypermethrin , permethrin and cyfluthrin are its synthetic chemical analogues 天然除蟲菊素是一種從菊花提煉的植物性殺蟲劑,而擬除蟲菊酯是類似天然除蟲菊