Rind Quality and High Tonnage in Citrus: Liquid Fertiliser Technology with Casablanca

Türkiye is a strategic player in world citrus production · orange, lemon, mandarin and grapefruit. In this export-driven sector, however, the grower's greatest fear is quality problems: short shelf life, fungal disease, cold damage and puffiness.

As conventional fertilisation methods fall short of dealing with these problems, liquid fertiliser technology · and Casablanca in particular · is opening a new chapter in citrus orchards. In this article we examine the biological shield effect Casablanca creates in citrus and the scientific reasons behind the yield increase.

Why liquid fertiliser?

Scientific research proves that liquid formulations are far more effective than granular fertilisers for nutrient uptake in citrus trees.

1. Fast absorption through the stomata: citrus leaves have a thick cuticle. Liquid fertilisers pass through the pores on the underside of the leaf directly into the cell sap, correcting a nutrient deficiency within hours.
2. Homogeneity: liquid fertiliser delivered through drip irrigation is distributed evenly across the whole fine-root zone (rhizosphere). A tree at one end of the orchard is fed to the same degree as one at the other.
3. Energy saving: to take up nutrients already dissolved in water, the plant does not need to secrete additional root acids; it spends its energy on growing fruit.

The Casablanca effect in citrus: "rubber plant" resilience

With its specific formulation and copper (Cu) technology, Casablanca creates a physical resistance mechanism in citrus trees described as the rubber plant effect.

1. A natural shield against disease and pests

The biggest problem in citrus is blemishing and softening of the rind surface. By thickening cell walls, Casablanca hardens both the fruit rind and the leaves.

• Result: strengthened tissue mechanically obstructs the entry of sucking pests such as red spider mite and of fungal disease spores.

2. Export quality: a bright, smooth rind

To reach a premium quality target, Casablanca saturates fruit cells with nutrition. This:

• Makes the rind surface brighter and more vivid.
• Helps prevent puffiness (separation of the rind from the flesh).
• Increases shelf life and resistance to transport.

3. Resistance to climatic stress

Citrus trees are sensitive to sudden temperature drops and frost risk. Because cell sap concentration rises in trees fed with Casablanca, tolerance to cold and to environmental stress reaches its highest level.

Rates and timing

For the best result in citrus, regular application after flowering and during fruit growth is recommended.

Method	Rate	Timing and frequency
Foliar	1–1.5 litres per 100 litres of water	After flowering and during fruit growth. 2–3 applications at 15-day intervals.
Soil (drip)	500–750 cl per decare	After flowering and during fruit growth. 2–3 applications at 15-day intervals.

Conclusion

In citrus orchards Casablanca is not only a nutrition product but a form of yield insurance. Trust Casablanca technology to take your place in the agriculture of the future, with healthier trees and export-quality fruit.

Grower's note: rates can vary with the age of the tree and the soil structure. Consult our technical team for the most accurate programme.