Vol. 107 No. 2 (2013)
Research Papers

Evaluation of the Incidence and Severity of Olive Leaf Spot caused by <i>Spilocaea oleagina</i>in different olive cultivars in Palestine

Ruba Abuamsha
National Agriculture Research Center (NARC), Qabatya, Jenin, West Bank
Mohammed Abueid
National Agriculture Research Center (NARC), Qabatya, Jenin, West Bank
Mazen Salman
Palestine Technical University-Kadoorie (PTUK)
Published December 20, 2013
How to Cite
Abuamsha, R., Abueid, M., Hajjeh, H., & Salman, M. (2013). Evaluation of the Incidence and Severity of Olive Leaf Spot caused by <i>Spilocaea oleagina</i&gt;in different olive cultivars in Palestine. Journal of Agriculture and Environment for International Development (JAEID), 107(2), 201-212. https://doi.org/10.12895/jaeid.20132.138

Abstract

Twelve olive (Olea europaea L.) cultivars including Nabali Baladi, Nabali Mohassan, Santa Augustino, Nasohi Jaba`a 1, Nasohi Jaba`a 2, Yunani, Talmasani, Chemlali, Arbequino, Frantoio, Coca and Barouni, were sampled for their susceptibility to Spilocaea oleagina the causal agent for Olive leaf spot (OLS) disease on olive trees in Palestine. Investigations were carried out to measure the incidence and severity of the disease at Qabatyia station in Jenin district area Susceptible olive cultivars grown commercially in Palestine include Arbequino, Frantoio and ?Barouni’.The “Nabali” is the most dominant and highly susceptible olive cultivar grown in Palestine. Disease incidence varied greatly among the cultivars F=59.4, df=11, 251, p?0.0001 and was correlated with the severity (y = 0.42x + 9.3, P ? 0.0001, R² = 0.84, y = disease severity and x = disease incidence). Disease severity also varied among different cultivars F=13.9, df=11, 251, p?0.0001. Nabali Mohassan was the most affected susceptible while Barouni was most resistant. Progress of disease severity over time fit the logistic function for all cultivars except for highly susceptible cultivars F=1.56, df=6, 83, p?0.169. The assessment method may be useful to screen olive cultivars for OLS resistance in Palestine.