Why do garlic leaves turn yellow? What should I do?

Article Catalog

1. Loose soil

2. Appropriate amount of top dressing

3. Alleviate obesity

4. Prevent and control pests and diseases

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There are many reasons for the yellowing of garlic leaves. If the soil is hardened and water and fertilizer cannot penetrate well, making it difficult for the roots to absorb nutrients, the soil must be loosened in time. If it is due to lack of nitrogen fertilizer, potassium fertilizer, etc., top-dressing should be carried out in time according to the actual situation and the amount of fertilizer should be controlled. If the roots are burned due to excessive fertilization, the soil should be irrigated with water in time to alleviate fertilizer damage. If it is caused by problems such as leaf blight, garlic gray mold, and garlic maggots, it is necessary to prescribe the right medicine and prevent it in time.

1. Loose soil

1. Loose soil

Reason: If the soil where garlic is grown is too compact, it is not conducive to ventilation and drainage, and hinders root breathing. In addition, soil compaction will prevent water and fertilizer from penetrating into the soil well, and the roots will not be able to absorb nutrients in a timely manner. If nutrients are not delivered in time, its leaves will slowly begin to turn yellow.

Measures: It is necessary to turn over the soil, loosen the soil, and loosen the soil in time to increase the softness, air permeability and drainage of the soil, so that water and nutrients can penetrate in time and be absorbed by the roots.

2. Appropriate amount of top dressing

Reason : If garlic grows without nitrogen fertilizer, the old leaves will turn yellow. If there is a lack of potassium fertilizer, its branches and leaves will become dry. If there is a lack of calcium, some necrotic spots will appear on the leaves, the heart leaves will turn yellow, and in severe cases, the leaf tips will die.

Measures: Observe the growth of garlic and apply fertilizer according to the actual situation, but not too much, especially nitrogen fertilizer.

3. Alleviate fertilizer damage

Reason: Applying too much fertilizer can easily burn the roots of garlic, affect its ability to absorb nutrients, and cause the outer leaves to turn yellow.

Measures: Irrigating with heavy water twice during consecutive sunny days can absorb the heat released by fertilizers in the soil and dilute the fertility. In addition, you can also spray foliar fertilizer to supplement the nutrient deficiency caused by garlic root burns. You can also apply some functional fertilizers that promote rooting to help the root system quickly sprout new roots.

4. Prevention and control of pests and diseases

Cause: Leaf blight, garlic gray mold and garlic maggots can also cause garlic leaves to turn yellow.

Measures: Carbendazim can be sprayed to prevent leaf blight. Garlic gray mold can be treated with chemicals such as fenzofen and permiocarb. For garlic maggots, prevention and treatment should be more timely. You can use 90% trichlorfon solution 600 times for root irrigation treatment, and water it every ten to fifteen days.

2. Appropriate amount of top dressing

3. Alleviate obesity

4. Prevent and control pests and diseases

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