isfendiyaroğlu, murat ege university - agricultural faculty - department of horticulture, İzmir, Turkey , çiğdem, zekeriya olive research institute, İzmir, Turkey , özeker, elmas ege university - agricultural faculty - department of horticulture, İzmir, Turkey

Effects of Chemical Fruit Thinning on Oil Yield and Quality in Gemlik Olive (Olea europaea L.)

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Gemlik olive variety started to be grown in many areas of Turkey in recent years. Gemlik is mainly a black table variety, but it is processed to oil in many areas. So chemical fruit thinning may be useful to control alternate bearing and standardization of the fruit and consequently the possible oil quality. In this work, predicting the effects of chemical fruit thinning by potassium salt of naphtaleneacetic acid (NAA-K) on oil yield and quality in Gemlik , which is one of the prominent olive variety of Turkey was aimed. Results showed that NAA applications decreased the oil acidity levels in the first year (off year). In the second year (on year), NAA sprayings at 100 and 120 ppm increased the oil acidity up to 1,75 % while 150 ppm decreased the acidity value to 0,36 %. 180 ppm NAA significantly augmented the oil content of olive fruits particularly in on year and gave rise to 22 and 48 % increments in oil rates successively on fresh and dry matter basis compared to control.

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Olive , oil , thinning , NAA , quality

The Journal Of Ege University Faculty Of Agriculture

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