Product Name: aluminum phosphide usage method: Take the preparation with 56% content as an example: 1. 3 ~ 8 pieces per ton of stored grain or goods; 2 ~ 5 pieces per cubic meter; 1-4 pieces per cubic meter of fumigation space. 2. After steaming, open the account curtain or plastic film, open the doors and windows or ventilation gate, and use natural or mechanical ventilation to fully disperse the gas and exhaust the toxic gas. 3. When warehousing, use the test paper soaked in 5% ~ 10% silver nitrate solution to test the toxic gas. Only when there is no phosphine gas can it be entered. 4. The fumigation time depends on the temperature and humidity. Fumigation is not suitable below 5 ℃; 5 ℃ ~ 9 ℃ for no less than 14 days; 10 ℃ ~ 16 ℃ for not less than 7 days; 16 ℃ ~ 25 ℃ for no less than 4 days; Not less than 3 days above 25 ℃. Smoke and kill voles, 1 ~ 2 tablets per rat hole.