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18. Szczygieł A. 1988. Problem replantacji sadów. Prace instytutu sadownictwa ikwiaciarstwa, 1–2 (97–98): 28–31.19. Szczygieł A., Zepp A. L. 1993. Preliminary study on the occurrence of replantdisease in apple orchards in Poland. Acta Horticulture, 324: 81–84.20. Švirinas S. 1990. Obelų sodų dirvų gentinio nualinimo tyrimai. Sodininkystė irdaržininkystė, 9: 21–31.21. Švirinas S. 1995. Obelų sodo veisimas buvusio sodo vietoje. Sodininkystė irdaržininkystė, 14: 21–28.22. Švirinas S., Lanauskas J. 2000. Obelų sodo veisimas buvusio sodo vietoje.Sodininkystė ir daržininkystė, 19(1): 43–52.23. Мороз П. А. 1990. Аллелопатия в плодовых садах. Наукова думка, Киев.24. Отто Г., Винклер Х. 1981. Проблемы почвоутомления и борьбы с ним внасаждениях яблони. Берлин.25. Фулга И. Г., Даду К. Я. 1991. Почвоутомление и садообороты в плодовыхнасаждениях Молдовы. Кишинев.SODININKYSTĖ IR DARŽININKYSTĖ. SCIENTIFIC ARTICLES. 2008. 27(3).Biological and technological aspects of apple replant diseasemanagement in LithuaniaJ. LanauskasSummaryThe review presents apple replant investigations carried out at the Lithuanian Instituteof Horticulture in 1990–2007. It was established the existence of apple replant problem in theEpicalcari–Endohypogleic cambisols, clay loam soils previously used for apple trees. Moreintense soil exhaustion there was in apple tree seedplots, less intense – in the orchards. Somespecies of micromycetes possible phytotoxin-producers were identified in the soil from appletree rhizosphere. Micromycetes of Verticillium dahliae sp. are responsible for root macerationand rots. Investigations of fertilizer effect proved that inferior growth of replanted apple treeswas not associated with nutrient deficiency in the soil. More effective fertilizers were in the soilcontaining fewer nutrients. Effect of fresh soil in planting holes was positive only for the youngtrees. Soil disinfection with formalin improved growth and yield of replanted apple trees. Preplantsupplements of manure or peat, deep tillage and digging of planting holes in autumn had notsignificant effect on tree growth and yield. Tested rootstocks or rootstock-scion combinationswere of different tolerance to replant problems. The most sensitive to replantation were rootstocksP 59 and P 60. The most depressed synthesis of photosynthetic pigments (chlorophyll a, b andcarotenes) was detected in the leaves of seedling rootstocks and rootstocks B.118, P 60 and P 59.Key words: soil exhaustion, apple trees, fertilizers, disinfection, micromycetes,rootstocks, photosynthetic pigments.141