The purpose of the study was to determine influence of natural essential oils, i.e. coriander and petitgrain oils on mortality of foxglove aphid (Aulacorthum solani Kalt.) occurring on tobacco. The above mentioned oils were used at the concentration of 0.02, 0.05 and 0.1%. The mortality of pest was evaluated 24, 48 and 72 hours after treatment. Natural essential oils such as coriander oil and petitgrain oil may be useful in the control of foxglove aphid (A. solani). After application of these oils mortality of the pest was significant and amounted to 81.20–99.47% and 89.80–99.50%, respectively (72 hours after treatment).
Monitoring of aphids - vector of potato diseases virus - continued in Poland for 30 years in 5 localities, indicated some changes in pressure exerted by these insectes. The biggest differences were observed for Macrosiphum euphorbiae (Thom.) and subsequently for Aphis frangulae Kalt. and Aulacorthum solani Kalt. Reduction in population of these aphids has been observed according to elapsing time in all five localities. In case of Myzus persicae (Sulz.) or Aphis nasturtii Kalt., these changes involved decrease or increase of the pressure, depending on the locality.