When I moved from E Texas to here in Copperas Cove, I brought with me a big plastic crate, all the herbicide and insecticides I had left. In the crate, was an unopened quart bottle of Malathion. I don't remember ever buying any so it must have come from the old barn my Father had built, left over from some long lost year. No telling how old it is. Last summer before it got really hot, we had a plague of pillbugs/rolypolys/sow bugs...whatever you want to call them, that every night grouped up and made a suicide jump off into the swimming pool. I decided to use the malathion. Good gawd almighty!!! I could barely stand to mix it and It stunk up the whole neighborhood. People were calling and coming by asking if I knew what the smell was and i flat lied and said it was probably something they were spraying over at ft hood.... NowI gotta wait until June when the county does their countywide trash and chemical thing where they accept paint, old gasoline, thinner and pesticides over at the disposal station at the dump. It's the only way I know to get rid of it.