Jelly seed

Jelly seed is a significant physiological disorder that affects the quality of mango fruits (Mangifera indica). Unlike fungal or bacterial rots, this condition is non-infectious, meaning it is caused by internal biochemical imbalances within the fruit during its development and ripening phases rather than by external pathogens.

The primary symptom of the disorder is the breakdown of the pulp tissue surrounding the seed, which turns into a translucent, gelatinous mass. In advanced stages, the texture becomes overly soft and watery, often accompanied by an off-flavor or fermentation smell. A critical issue is that the skin of the fruit typically remains intact and healthy, making the defect invisible during harvest and sorting.

The development of jelly seed is closely linked to nutritional imbalances, specifically a deficiency of calcium, which is essential for maintaining cell wall integrity, combined with excessive nitrogen application that encourages rapid, succulent growth. Environmental factors, including high temperatures and extreme fluctuations in humidity during the final stages of maturation, significantly exacerbate the susceptibility of the fruit to this breakdown.

The economic impact of this disorder is severe for the fruit industry, particularly for export-oriented businesses. Since the disease is hidden from view, retailers and exporters may face high rejection rates at the destination point, resulting in massive financial losses and a decline in consumer trust regarding fruit quality.

Management and prevention strategies focus on optimizing orchard practices. Producers should prioritize balanced fertilization, specifically targeting calcium uptake, and manage irrigation effectively to avoid water stress. Furthermore, monitoring the exact timing of harvest is crucial; avoiding late harvests helps prevent the natural over-ripening process that leads to jelly seed, while proper post-harvest temperature control remains the most reliable way to mitigate progression during supply chain transit.