Effect of some plant extracts in Inducing Systemic Acquired Resistance to Peacock Leaf Spot in Olive

Kenan naema(1)*, Mohamad tawel(2) and Basima barhoom(3)

(1) General commission of scientific agricultural research, Tartous, Syria.

(2) Tishreen University, College of Agricultural Engineering, Latakia, Syria.

(3)General commission of scientific agricultural research, Latakia, Syria.

(*Corresponding author:  Kenan naema. kenan.fadel.naema@gmail.com)

Received: 21/10/2021                          Accepted: 28/12/2021


This study was carried out at Al-Jamasa Research Station – Agricultural Scientific Research Center in Tartous – General Authority for Scientific Agricultural Research for the season 2018-2019 on two-year-old olive plants, homogeneous, healthy, and free from disease and insect infestations, of the Doabli variety most prevalent in Tartous Governorate.  The trees were treated with Inula viscosa and Cymbopogon citrates aqueous extract 15 days before the fungal infection with Venturia oleaginea. The incidence and severity of infection were weekly monitored within 10 weeks after the infection. The results showed that the best resistance was achieved when olive trees were treated with Inula viscosa aqueous extract as the incidence of the disease was 16.64% and the severity was 8.90 % after 10 weeks compared with 56.06 and 26.91 respectively for control, followed by the treatment of Cymbopogon citrates aqueous extract with disease incidence 18.41 % and disease severity 11.2 %.

Key words: Venturia oleaginea, Cymbopogon citrates, Inula viscose, aqueous extract, systemic acquired resistance

Full paper in Arabic: pdf