Identifying causes, prevention and control.
Record the onset and pace of changes, and examine new growth, the stem base and roots. Similar symptoms can result from cultivation conditions, feeding damage or infection. Observe a new or suspect specimen separately from the rest of the collection. [Fleischer and Schütz 1978] [9-WWW]
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Similar discolouration or wilting may result from different disorders. Diagnosis relies on root condition, the distribution of changes and the history of cultivation conditions. [Fleischer and Schütz 1978]
3 min readAn asymptomatic appearance does not confirm plant health, and mosaic patterns or deformation do not establish a viral infection. Checking material used for grafting and propagation is particularly important. [Maliarenko and Mudrak 2013]
2 min readBacterial diseases cannot be excluded because older guides considered them rare. Studies have demonstrated a bacterial cause of cactus rots, and phytoplasmas have been found in plants with abnormal growth. [Mejía-Sánchez et al. 2019]
2 min readRot is not the name of a single pathogen. Diagnosis must consider where the disease began, host susceptibility and the identity of the causal organism. [Kamali-Sarvestani et al. 2022]
3 min readInsects, mites and nematodes require different management. Identification of the organism and its feeding site precedes selection of a protection method. [Fleischer and Schütz 1978]
4 min readName, current scope and the distinction between non-professional and professional users. Document status as of 9.10.2026. [10-WWW]
