انتشار و إدارة آفة الفيلوكسيرا على العنب الكرمة في محافظة درعا، سورية

الملخص EN

Daktulosphaira vitifoliae Fitch.

(Family: Phylloxeridae, Order: Hemiptera, Class: Insecta) is the most harmful and prevalent pest on grapevines in Dara´a governorate, and is considered the principal agent responsible for gravines dieback in recent years.

The incidence of vineyards attacked by this pest was 82.5%.

The cultivation of local self-rooted V.

vinifera Balady and Halwany cultivars (56%) was the main reason for pest spread in this governorate.

The wrong practice of covering the graft union of grafted vines to Phylloxera-resistant rootstocks under soil surface, new roots originated from the scion were attacked by the pest.

The highest pest incidence was recorded on cultivated grapevines in second agricultural region (Tafas, Dail and Ebt´a), and reached 60.3% on Balady cultivar, and 32.2% on Halwany cultivar; followed by forth agricultural region (Sheikh Saad, Adwan and Jasem), with mean pest incidence of 51.2% on Balady cultivar and 11.9% on Halwany cultivar.

The rate of infection frequency with Phylloxera pest was higher in vineyards with ungrafted Balady cultivar (87.5%) compared with 65.5% for ungrafted Halwany cultivar.

The mean pest incidence on Balady and Halwany cultivars in Dara'a governorate was 41.4 and 19.2%, respectively.