To assist farmers in fertilizing durian trees as required, giatieu.com cites documents from the world’s leading reputable reference sources.
Lack of nutrition, yellow leaves, stunted growth, poor growth…
The nutritional deficiency symptoms displayed on the leaves of durian trees described below have been collected and evaluated by the world’s leading research agency.
Lack of nitrogen. The most common symptom, mature leaves are pale yellow but do not cause defoliation. The veins are also yellow.
Lack of phosphorus. Leaves are much smaller than with full fertilization.
Lack of potassium. Symptoms appear first on older leaves, characterized by yellowing of the tips of the leaves, extending to the margins. Then the yellow leaf parts will turn brown and necrotic.
Calcium deficiency. The disease is characterized by severe stunting, small leaves and necrosis on the tips of medium and old leaves.
… magnesium deficiency.
Magnesium deficiency. Yellowing occurs mainly on older leaves, starting in the middle of the leaf near the midrib and extending to the margins. The main veins are still green. May cause leaf drop.
Lack of sulfur. Symptoms first appear on the young leaves, initially as small yellow spots and the yellow spots will gradually grow, with the veins remaining green. Leaves often form convex curves on the upper surface of the leaf.
Iron deficiency. The young leaves do not form chlorophyll, with the remaining main veins becoming distinctly green.
Lack of manganese. Plants are stunted, old leaves become green and yellow, with veins still green. Leaves tend to fall off.
…lack of copper
Lack of copper. Finally, the young leaves are deformed, with a brown border, followed by withering of the tips. Thus, there is proliferation of the lateral shoots, but also no correction.
Fake fertilizer, trees lose leaves because of hunger…
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