SodininkyStĖ ir darŽininkyStĖ 27(3)

15. Peirs A., Scheerlinck N., Perez A. B., Jancsok P., Nicolai B. M. 2002. Uncertaintyanalysis and modelling of the starch index during apple fruit maturation.Postharvest Biology and Technology, 26: 199–207.16. Streif J. 1996. Optimum harvest date for different apples cultivars in the‘Bodensee’ area. The Postharvest Treatment of Fruit and Vegetables. Cost 94.East Malling, 15–20.17. Streif J., Bufler G. 1990. Physiological ripening parameters at optimum pickingdate off different apple varieties. Abstracts of Contributed Papers. XXIIIInternational Horticulture Congress. Firenze.18. Tyburski M. S., Wazbinska J., Golaszewski J. 2003. Effect of different thinningmethods of fruit sets on fruit setting and yield of apple cultivars ‘Lobo’ and‘Spartan’. Sodininkystė ir daržininkystė, 22(1): 47–5.19. Webster T. 2002. Current approved thinning strategies for apples and pears andrecent thinning research trials in Europe. The Compact Fruit Tree, 35(3): 73–76.20. Yong Soo H., Yong-Pil Ch., YacChang L. 1998. Influence of harvest date andpostharvest treatments on fruit quality during storage and simulated marketingin ‘Fuji’ apples. Journal of the Korean Society for Horticulturae Science,39(5): 574–578.21. Zude-Sasse M., Herold B., Geyer M., Huyskens-Keil S. 2001. Influence of maturitystage on physical properties in apple. Acta Horticulturae, 553: 109–110.22. Кудрявец Р. П. 1987. Продуктивность яблони. Агропромиздат, Мocквa.SODININKYSTĖ IR DARŽININKYSTĖ. SCIENTIFIC ARTICLES. 2008. 27(3).Research on fruit quality optimizationN. KviklienėSummaryIn 1996 at the Lithuanian Institute of Horticulture there were conducted fruitlet thinningtrials and in 2002 – the trials of determination of optimum harvest date in order toensure the highest apple fruit quality. The aim of investigations was to estimate the influenceof thinning time and various chemicals on apple fruit quality and alternate bearing.Four apple cultivars ‘Ligol’‚‘Lodel’, ‘Alva’ and ‘Shampion’ on M.26 rootstock weretested. There were investigated physiological and biochemical changes during maturationperiod. The effect of apple maturity on fruit quality and storage ability was investigated too.Key words: fruitlet thinning, fruit quality, optimum harvest date.134