Evaluation of the Incidence and Severity of Olive Leaf Spot Caused by Spilocaea oleagina on Olive Trees in Palestine
Open Access
- 1 January 2011
- journal article
- Published by Scientific Research Publishing, Inc. in American Journal of Plant Sciences
- Vol. 02 (03), 457-460
- https://doi.org/10.4236/ajps.2011.23053
Abstract
Olive Leaf Spot (OLS) is found in many parts of the world and cause readuced growth and yield in olive trees. In this study, investigations were carried out to measure the incidence (% infected leaves) and severity (number of lesions/leaf) of OLS in olive growing regions in Palestine, including the regions of Hebron, Bethlehem, Tulkarm, Salfit, Jenin, Nablus, Ramallah and Qalqiyah. OLS was found in all study areas with significantly higher percent incidences in Jenin and Nablus (67.16% ± 18.16% and 46.06% ± 23.70%, respectively). OLS was more severe in Nablus, Qalqilyah, Jenin and Tulkarm (severity grade 3.0 - 3.7). Analysis indicate that there is a positive correlation (R2 = 0.597) between disease incidence and severity. OLS appeared to be particularly severe on trees that were growing in regions with higher annual rainfall. The correlation between severity and rainfall was positive (R2 = 0.543)Keywords
This publication has 6 references indexed in Scilit:
- Greenhouse and field evaluation of fungicides for control of olive leaf spot in New ZealandCrop Protection, 2008
- Effect of temperature, relative humidity, leaf wetness and leaf age on Spilocaea oleagina conidium germination on olive leavesEuropean Journal of Plant Pathology, 2007
- EFFICACY OF KRESOXIM-METHYL AGAINST OLIVE LEAF SPOT CAUSED BY SPILOCAEA OLEAGINAActa Horticulturae, 2002
- Consistent annual treatment helps future olive leaf spot controlCalifornia Agriculture, 1995
- Improving the accuracy and precision of disease assessments: selection of methods and use of computer-aided training programsCanadian Journal of Plant Pathology, 1995
- Disease Incidence and Severity RelationshipsAnnual Review of Phytopathology, 1984