History of Postage Stamps The Post Office Department issued its first postage stamps on July 1, 1847. Previously, letters were taken to a Post Office, where the postmaster would note the postage in the upper right corner. The postage rate was based on the number of sheets in the letter and the distance it would travel.
General Information. Dimethoate is a systemic and contact organophosphorus insecticide registered for use in the U.S. in 1962 and used on several field grown agricultural crops (e.g., leaf greens, citrus, and melons), tree crops, and ornamentals.Residential and non-agricultural uses were cancelled in 2000.imethoate is absorbed from the gastrointestinal tract, the lungs, and through the skin. General population exposure to dimethoate or omethoate can occur by eating foods treated with dimethoate or by drinking water.
Like all OPs, dimethoate acts by interfering with the activities of cholinesterase, an enzyme essential for the proper functioning of the nervous system of insects and humans(8). Production and use Dimethoate is used in a large number of products.In the US, it has 166 approved labels(9). Its trade names include Afidox (produced by Lucava), Cekutoate (Cequisa), Perfekthion (BASF), Rogor (Isagro), Dimezyl (Agriphar), Hilthioate (Hindustan), and Teeka (Nagarjuna Agrichem)(10).s with all OPs, dimethoate is rapidly absorbed through the skin, and easily absorbed through the lungs(20). The population as a whole is not generally subject to exposure to dimethoate from air, water or food(21); however occupational exposure may occur during manufacture, formulation and use.