Effect of some plants extracts on the storabity of potato tubers (Solanum tuberosom L.) Desiree Cv.

Abstract

This experiment was conducted on potatoes tubers, Desiree Cv. grade A from spring season of 2004 which has been obtained from Horticulture Dep. Fields. Curing was carried out for these tuber seeds and divided them to a loats each loat was dipped in either Dill seed extract, the leaves extract of Rosemary and sage with three concentration (2, 4, 8 gm/ L H2O) for each extract beside Greap water as (1.5, 30, 6.0 ml/ L H2O), as well as the control treatment. Dipping was done for 10 and 20 min. and the treated tubers stored in a cold store at 4 ± 2C0 and relative humidity of 85% from 1/6/2004 until 31/12/2004. Tubers then preperated from spring cultivation by conditioning from three weeks. Results show that Sage extract increased sprouting percentage to 82.97% and T.S.S to 5.60 also increased peroxidase enzyme activity to 26.24 absorbing unit/ gm tuber but decreased protein percentage to 1.22. Vit C. content increased to 7.52 mg/ 100 gm in the control treatment.