Development and morphological changes in leaves and branches of acid lime (Citrus aurantifolia) affected by witches’ broom disease
- Al Yahyai R. A.
- A. M. Al Sadi
- F. A.J. Al Said
- Z. H. Al Kalbani
- C. M. Carvalho
- S. L. Elliot
- BERTACCINI, ASSUNTA
DOIAbstract
Witches’ broom (WB), associated with the presence of ‘Candidatus Phytoplasma aurantifolia’, is one of the most serious diseases of acid lime. This study determined incidence, distribution, and development of the dis-ease, and morphological changes in leaves and branches of affected host plants. Survey in different parts of Oman showed that WB occurs in most regions in the country, where 108 out of 158 (68%) surveyed farms were found to have diseased trees. A survey of 6,926 acid lime trees showed that severity of WB was positively related (r = 0.948; P<0.01) to tree age. The mean percentage of symptomatic branches was 1% in 3-year-old trees compared to 63% in 12-year-old trees. To further characterize morphological changes in WB-affected li...
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