Plant pollination of a low intensity as causal agent of seasonal allergy

Many well-known plants such as a birch, alder, hazel, oak, grasses, ragweed, sa?geb?rush, etc. produce a huge amount of the allergenic pollen. Some pollen types represented in the ambient air with low concentrations only are able to provoke the hay fever symptoms. These are particles migrating over long distances through the atmosphere, pollen of entomophilic and rare plants of the particular area. 16 aeropalynological categories of arboreal flora emitting small number of pollen grains into the ambient air were identified in the Vinnitsa atmosphere for 2009?2011. Peak pollen count was registered in spring and summer months for the mentioned plants. Most pollen produced by (Ostrya), olive (Olea), aspen (Populus tremula), plants of Cypress family (Cupressacea) was registered in April. Pollen peaks of plants belonging to elderberry (Sambucus), larch (Larix), spruce (Picea), Horse Chestnut (Aesculus), mulberry (Morus), lilac (Siringa), guelder rose (Caprifoliaceae), beech (Fagus), fir (Abies) genera and Rose family (Rosaceae) were observed in May. Most pollen produced by the linden tree (Tilia) was seen in July and Cedar (Cedrus) pollen was registered in August. The risk of the hay fever symptoms appearance to the mentioned pollen types must be taken into consi?deration for pollen-sensitive individuals.