تأثير بعض المواد المانعة للتبخر في القابلية الخزنية لثمار النخيل صنف البرحي Phoenix dactylifera L. cv. Barhi

Abstract EN

Date palm fruits cv.Barhi were Collected from private orchard in Abu Khasib region, south of Basrah city during the season of (2010).

Fruits Treated with two anti-transpirants (Vapor gard “VG”) and (Stress relief ” SR”) with two concentrations for each of them (2.5% and 3.5% w/w) in addition to control (distilled water only) by dipping fruits in the previous concentrations and spraying fruits with them at the beginning of rutab stage .Then fruits packed in perforated polyethylene bags ( 2 kg ,22 hole, hole diameter, 0.5 mm) and stored at (-3 ± 1 °C).

Results showed that the loss of weight , the percentage of decay , total soluble solids and total and reducing sugars increased with increasing the duration of storage.

While sucrose and total acidity decreased with increasing the duration of storage.

Treatment (VG 3.5%) was superior to others in reducing the loss of weight of fruits, While the highest percentage of weight loss was in the fruits of control.

The highest percentage of fruit decay was in untreated fruits compared with treated fruits.

Untreated fruits recorded the highest increase in total soluble solids , total and reducing sugars and the lowest percentage of total acidity, while the lowest percentage of total soluble solids and total and reducing sugars was in the fruits of treatment (VG 3.5%) which had no significant differences with the treatment (VG 2.5%).

The effect of methods of treatment had no significant differences for all studied properties except for the percentage of decay which increased significantly in fruits dipped in the concentrations than those of sprayed..

Treatment (VG 3.5%) with dipping method recorded the lowest weight loss of fruits which had no significant differences with the same treatment with a spray method.

The highest weight loss , the highest percentage of decay and the highest percentage of total soluble solids and total and reducing sugars were in sprayed fruits of control treatment after four months of Storage.