This is perfect to keep all insect away! This stuff stinks (smell doesn't last long) but it is the best product I have ever bought. The smell started out like dead animal, but has now morphed into rotten cabbage. Placed this product in very small amounts in cornes in, under and around any area that roaches crawled, kitchen, bathrooms, bedrooms, inside and outside. We had a problem with roaches (product advertises for fire ants) after saving paper sacks. This guide covers TOP best roach killers, including all sorts of poison baits, traps, sprays, foggers, and insect growth regulators.They all are designed to kill these insects but do it in their particular way: some solutions knock down immediately on contact, others act slowly so that the poison could eliminate other members of the colony. The petroleum jelly grabs the insects and doesn’t let them go, like a homemade Roach Motel. More complex versions might turn the roaches’ feces into more poison, infect their water supply, or even spread from the dead bodies of other roaches. These droppings look like coffee grounds and black pepper and have a sweet but unpleasant smell. You can make fantastic cockroach traps using nothing more than petroleum jelly and a little sugar. However, this king of poisons has taken many famous lives: Napoleon Bonaparte, George the 3rd of England and Simon Bolivar to name a few. But I find this dupe to smell more like poison (80s), than the weak plum and sugar water that Dior have the cheek to sell as Poison these days. I like that there are multiple treatments in one affordable package so if another mound pops up elsewhere in the lawn I don't have to go right back to the store. There's still a faint sickly-sweet trace of decaying mammal flesh, but now it's mainly a vegetable smell. The simplest roach killers are just a poison that contains ingredients roaches like to eat, which they’ll mistake for food and share with the rest of their nest. But that’s until the Marsh test came and signalled the presence of this poison in water, food and the like. Ammonia Solution to Kill Roaches. On another note, arsenic, like belladonna, was used by the Victorians for cosmetic reasons. It does have a cabbage type smell at first when you open the top but after place it down, you can’t smell it!! Poison and dehydrating agents aren’t your only weapons against roaches. To use this method, add two cups of ammonia powder in a container full of water and run it through your bathroom outlet and the kitchen sink. Check for egg casings and areas where roach droppings are plentiful. Cockroaches aren’t discriminating about where they go to the bathroom; they leave their droppings everywhere they go. For this reason poison dart frogs can afford to be outrageously brightly coloured. 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