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Eriophyoid mites fauna (acari: prostigmata) on pyrus communis l. In the fomin botanical garden

L. Bondareva, National University of Life and Environmental Sciences of Ukraine

Abstract: On the territory of the Academician A.V. Fomin Botanical garden three species of mites of the superfamily Eriophyoidea were found in pear orchards. It has been found that Eriophyes pyri Pgst and Epitrimerus pyri Nal. dominate. For the first time, individuals of Epitrimerus marginemtorguens Nal., have been found on pear 12 leaves. Eriophyes pyri is a widespread and dangerous pest of pears in all localities of cultivating this plant species in Ukraine. Epitrimerus pyri is less harmful in pear plantations of the botanical garden. Epitrimerus marginemtorguens appeared mainly in the second half of the growing season. The phenology of four-legged mites has been clarified and the sequence of Eriophyes pyri leaf population on a growing pear shoot has been determined. The period of formation of 7–9 ordinal leaves on the growing shoot is the key moment when the first generation of mites leaves the old galls and colonizes the newly formed leaves. During this period, the phytophagy moves from a hidden to an open way of life and is available for methods and means used in plant protection. A similar moment is also observed during the migration of the second generation to the apical leaves and the third generation – to the buds for wintering, but this process is greatly extended over time and is not so suitable for applying the acaricides.
Keywords: growing season / mites / shoot / Nal / Fomin / marginemtorguens / Epitrimerus / pyri / pear / leaves

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