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ISHS Acta Horticulturae 1299: XXX International Horticultural Congress IHC2018: VII International Symposium on Tropical and Subtropical Fruits, Avocado, II International Symposium on Jackfruit and Other Moraceae and II International Symposium on Date Palm

Foliar application of IBA and GA3 on Mexican lime trees infected with witches' broom disease

Authors:   S. Faramarzi, H. Hasanzadeh Khankahdani
Keywords:   Mexican lime, phytoplasma, plant hormone, Citrus aurantifolia
DOI:   10.17660/ActaHortic.2020.1299.27
Abstract:
The witches' broom disease is a phytoplasmic disease that is found on Citrus aurantifolia (Mexican lime). The disease is one of the most common diseases in the south of Iran, which has caused great damage to the country's agricultural industry. The causative agent of this disease is Candidatus Phytoplasma aurantifolia, which is a prokaryotic (pseudo-bacterial) microorganism. The main symptoms of this disease are small and yellow leaves with short internodes. A random complete block design (RCBD) experiment was carried out in order to study the effects of plant hormone compounds on the disease, and each tree was considered as a block. The treatments used in this study were included foliar application of IBA (Indole-3-butyric acid, 600 ppm) and GA3 (gibberellic acid-3, 600 ppm). The morphological traits, total protein, total chlorophyll, carotenoid content, PI and Fv/Fm of leaves were compared before and after treatment.

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