The paper introduced the principle , the test conditions and the operation steps of drying the pyrethrumflower ;
本文主要介绍了除虫菊鲜花的真空冷冻干燥技术的原理、条件和操作步骤。
2
Extracted pyrethrins from pyrethrum dried flower by super critical CO2 . is a paste called oleoresin which isn't suitable to formulate insecticidal products either use in household or crops.