The presented studies revealed the usefulness of spruce oil, basil oil, juniper oil and clove oil in monitoring of the occurrence of pea leafminer (Liriomyza huidobrensis Blanchard). While using above mentioned oils on yellow sticky traps, it was found that the number of trapped insects increased significantly. In relation to the control (traps without any addition of aromatic substance), the increase amounted to: 561.33%, 287.95%, 159.74% and 130.77%, respectively.

The presented studies revealed the usefulness of marjoram oil, thyme oil, juniper oil and sweet flag oil in the monitoring of the occurrence of greenhouse whitefly (Trialeurodes vaporariorum Westwood). While using the examined natural essential oils on yellow sticky traps, it was found that the number of caught insects increased significantly. In relation to the control (traps without any addition of aromatic substance), the increase amounted to: 423.13%, 422.28%, 209.91% and 139.43% respectively.