تأثير الإصابة بفيروس تريستيزا الحمضيات الموالح في نوعية ثمار البرتقال البلدي و الساتزوما في حريصون، سورية

الملخص EN

Effect of Citrus tristeza virus (CTV) infection on quality of Balady common orange and Satsuma fruits when grafted on sour orange rootstock in Hraisoon during 2012- 2013 season was studied.

Fruits weight and size of Balady common orange were reduced from 200.78 g and 227.62 ml in non -infected trees to 197.04 g and 202.

86 ml in CTV-infected trees, respectively.

Fruits weight and size from Satsuma trees was reduced from 176.72 g and 193.93 ml in non-infected trees to 159.56 g and 164.08 ml in CTV-infected trees, respectively.

CTV infection caused increase in rind thickness of Balady common orange fruits (0.47cm) as compared with non–infected trees (0.42cm).

However, CTV infection had no significant effect on rind thickness of Satsuma fruit.

In addition, juice content was reduced in Balady common orange fruits from 48.56% in non- infected trees to 42.94% in CTV–infected trees, and juice content in Satsuma fruits was reduced from 41.34% in noninfected trees to 38.13% in CTV- infected trees.

Furthermore, CTV infection caused increase in acidity, and reduction in total soluble solids and vitamin C contents in fruits of both varieties as compared with the healthy control.

The above data suggest that CTV infection reduced fruits quality in both citrus varieties investigated.