In order to introduce it into production, a new fumigant-phosphinal plus was tested in the form of 58% tablets in the norm of 3, 4 and 5 grams per cubic meter (m3) of fumigation chamber volume. The fumigation effect of the drug was tested against 4 types of barn pests. Fostoxin in the form of 56% tablets was used as a reference and compared with the control variant (without treatment with fumigants).In fumigation chambers and in storage facilities, phosphinal plus tablets, at a rate of 3 g / m3, have an average of 89.4% efficiency, and with 4 g / m3 the effectiveness of the drug reaches 100%. Based on the results, phosphinal plus is recommended for controlling barn pests.