The results of Ross (1936), De Meillon (1936), Covell et al. (1938), Russell and Knipe (1939, 1940, 1941), and Russell et al. (1942) leave no doubt that wherever the mosquito vector of malaria spends its daytime hours inside houses, cowsheds, or outbuildings, routine spraykilling with pyrethrum sprays will effectively interrupt the transmission of malaria. This measure is based on the principle...

Pyrethrum is a perennial daisy grown commercially for the insecticide that is extracted from its flowers. In order to evaluate germination and seedling growth of pyrethrum under different temperature and drought stress treatments, an experiment was conducted in seed technology laboratory of Faculty of Agriculture of Islamic Azad University of Isfahan branch in 2018. During this experiment, poly...

Pyrethrum is a perennial daisy grown commercially for the insecticide that is extracted from its flowers. In order to evaluate germination and seedling growth of pyrethrum under different temperature and drought stress treatments, an experiment was conducted in seed technology laboratory of Faculty of Agriculture of Islamic Azad University of Isfahan branch in 2018. During this experiment, poly...

Synthetic pyrethroids are synthesized derivatives of naturally occurring pyrethrins, which are taken from pyrethrum, the resin extract of dried chrysanthemum flowers. They were introduced to provide a less hazardous and less persistent alternative to organochlorine and organophosphate insecticides. They are among the safest insecticides available on the basis of their low acute toxicity to mamm...