Deficiencia de Azufre
Sulfur Deficiency
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Pathogen:
Nutritional disorder
Type:
Risk to the plant:
INTERMEDIÁRIO
DESCRIPTION
WHO CAUSES IT?
Sulfur is a secondary macronutrient essential for the synthesis of amino acids (cysteine and methionine), proteins, vitamins, and coenzymes. It also participates in the formation of essential oils and in the natural defense of plants against pests and diseases. Its deficiency is especially observed in soils poor in organic matter, very sandy, with intense leaching, or in areas where low-sulfur fertilizers are used. Unlike nitrogen, sulfur is not very mobile in the plant, so symptoms appear first on young leaves.
SYMPTOMS
Sulfur deficiency can be confused with nitrogen deficiency, but it affects young leaves rather than older ones.
Typical symptoms:
• Yellowing (chlorosis) in young leaves and new shoots.
• Delayed overall plant growth.
• Thin, brittle stems.
• Delayed flowering and ripening.
• Lower protein and oil content in grains and seeds.
Sulfur deficiency develops progressively and, if not corrected, limits crop quality and yield, especially in legumes, cruciferous crops, and cereals.
Developmental stages:
• Early: Young leaves with a uniform pale green color.
• Intermediate stage: More intense chlorosis in shoots, slow growth.
• Advanced: Thin stems, small, deformed leaves.
• Final: Marked reduction in flowering, protein-poor seeds, and lower total yield.
TEMPERATURE AND HUMIDITY
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HOW IS IT SPREAD?
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HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• SOLUBLE SULFUR FERTILIZERS: Ammonium sulfate, potassium sulfate; rapid assimilation.
• ENCAPSULATED / CONTROLLED-RELEASE FERTILIZERS: Maintain a constant supply in long-cycle crops.
• ORGANIC FERTILIZERS + SULFUR: Compost, manure; naturally release sulfur.
• AMINO ACIDS + SULFUR FERTILIZERS: Improve rapid absorption during critical crop phases.
Authorized treatments in organic farming
• SOLUBLE SULFUR FERTILIZERS: Ammonium sulfate, potassium sulfate; rapid assimilation.
• ENCAPSULATED / CONTROLLED-RELEASE FERTILIZERS: Maintain a constant supply in long-cycle crops.
• ORGANIC FERTILIZERS + SULFUR: Compost, manure; naturally release sulfur.
• AMINO ACIDS + SULFUR FERTILIZERS: Improve rapid absorption during critical crop phases.
Insect allies
PREDATORY MITES
LADYBUGS
LACEWINGS
PARASITIC WASPS
HOVERFLIES OR PARASITIC FLIES
PREDATORY BUGS
There are no natural allies
Mycodiplosis oidii (predatory mosquito)
EFFECTIVE PRODUCTS TO ELIMINATE THIS DISEASE
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To maintain an adequate supply of sulfur and promote protein and vitamin synthesis, it is important to implement practices that optimize its availability in the soil and facilitate its uptake by the roots.
• Apply sulfur-rich fertilizers, such as ammonium sulfate or potassium sulfate.
• Incorporate compost or well-rotted manure.
• Use green manures that provide sulfur.
• Maintain adequate irrigation to promote uptake.
• Correct soil pH if it is outside the optimal range.
• Control weeds that compete for nutrients.
• Maintain adequate levels of organic matter in the soil.
Recommendations
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