You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Least toxic organiophosphorus compound is - and explain in detail?
Malathion has the least toxicity of all organophosphorus compounds. Yellow/clear brown liquid used in dose of 100-200 mg.per.sq.ft. every 3 months because of its low toxicity, malathion has been recommended as an alternative insecticide to DDT. as a low volume spray (ULV) spray it has been widely used to kill adult mosquitoes to prevent or interrupt dengue hemorrhagic fever and mosquitoes borne encephalitis epidemics. Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 844