Calcium is critical in pears, and fruit concentrations need to be double that acceptable for apples. Regular applications are important. Up to eight foliar sprays have proven effective at reducing water core in Japanese pear.
Reducing Water Core Occurrence in Top Fruit
Water core develops in mature apples when the sugar sorbitol is translocated into the fruit faster than it can be assimilated. The area surrounding the core becomes water-soaked or translucent and may appear glassy and hard. Only in severe instances are symptoms found on the outside of the fruit. Water core is more likely to occur in apples exposed to heat and sunlight. Inadequate supply of calcium is a major contributing factor.
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Crop Nutrition and Water Core
Recommended Yara Fertilizers for Top Fruit
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YaraMila COMPLEX
12-4.8-14.9 + 8% S - Prilled NPK fertilizer which also contains magnesium and sulphur as well as micronutrients ideal for use on a wide range of arable and horticultural crops.
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YaraLiva TROPICOTE
15.5% N + 19% Ca - Granular calcium nitrate fertilizer for field application to a wide range of crops.
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YaraVita ZINTRAC 700
A fully formulated flowable liquid micronutrient fertilizer containing 700 g/l zinc for foliar application to prevent and treat zinc deficiency on a wide range of crops.
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YaraVita BORTRAC 150
A liquid micronutrient fertilizer containing 150 g/l boron for foliar application to provide additional boron or to treat boron deficiencies in a wide range of crops.
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YaraVita SENIPHOS
A liquid micronutrient fertilizer containing high concentrations of phosphate and calcium for foliar application to improve yield and quality in fruit and potatoes.
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YaraVita STOPIT
A liquid micronutrient fertilizer containing 160 g/l calcium for foliar application to control and reduce calcium related disorders in top fruit and other crops.
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YaraVita BUD BUILDER FL
A flowable liquid suspension fertilizer with nutrients and micronutrients including magnesium, zinc, nitrogen, boron and phosphate for foliar application to improve the flowering of top and soft fruit.