كفاءة حمض السالسيليك في مقاومة مرض عين الطاووس المتسبب عن الفطر Spilocaea oleagina على غراس الزيتون تحت ظروف العدوى الاصطناعية

Abstract EN

To study the efficacy of salicylic acid in the control of peacock eye disease, several treatments with salicylic acid were investigated with pathogen inoculation at different intervals on a 1-2 year old susceptible Khadairy olive variety.

The artificial inoculation was performed 2 weeks or 4 weeks after the one treatment with salicylic acid or the two salicylic acid treatments at 15 days interval, and the inoculation was carried out 4 weeks after the first treatment.

A standard copper oxychloride treatment was also used for comparison.

Disease symptoms appeared 80 days after inoculation.

Treatment effectiveness was measured as reduction in the leaf affected area compared with the untreated control.

Effectiveness in one treatment with salicylic acid and inoculation after 2 weeks in the last reading (165 days after inoculation) was 80.2% compared to 85.8% in the chemical control (copper oxychloride) treatment.

Effectiveness was increased to 84.7% in one treatment 4 weeks after inoculation, as compared to 82.7% in the chemical control treatment.

The most effective result (89.9%) was obtained following two applications with salicylic at 15 days interval with inoculation of the pathogen 4 weeks after the first application, as compared to 88.6% effectiveness for the copper oxychloride treatment.