Bunchy Top or Crown Rosetting is an agricultural and physiological problem affecting crops and ornamental plants, characterized by halted or slowed main stem elongation, stunting of upper growth, and the accumulation of young leaves in a tight, rose-like cluster. This phenomenon is often caused by a severe deficiency in the micronutrient boron—responsible for cell division and sugar transport—or by systemic viral infection transmitted via vector insects or contaminated tools. Symptoms clearly manifest through the deterioration of the plant's aesthetic appearance, loss of decorative and economic value, and halted productivity. Control requires strict preventive measures including balanced fertilization, proper laboratory diagnosis, the use of clean, certified seedlings, and precise agricultural hygiene practices according to plant pathology research and plant protection organization bulletins.
Plant pathology and macronutrient and micronutrient deficiency physiology studies issued by plant protection organizations and global agricultural horticulture magazines. General information from the Syrian Agricultural Guide and Livestock in Syria _ Specialized Evidence Center.
