Causes and Solutions for Dry, Withered Edges on Apple Leaves

In apple growing, problems first show up on the leaves, so we can often observe leaf growth to learn about the condition of the apple tree, whether it is sick, or lacking a certain nutrient, or affected by outside factors. That way we can make the corresponding adjustments. So what exactly is the problem when apple leaves have dry, withered edges? Let's take a look together.

1. Causes

One cause is a lack of potassium, and another is pesticide concentration being too high when sprayed, causing pesticide damage. Sometimes too much fertilizer applied too close to the root system, at too high a concentration, burns the roots and affects growth. Some diseases, such as root rot, easily lead to dry, withered edges. Sometimes a lack of calcium also causes the edges of leaves to dry out.

2. Correcting Nutrient Deficiency

Generally, if only a few leaves show it at first, you can start improving it. For potassium deficiency, promptly supplement some potassium fertilizer, or use plant ash mixed with soil. After a period of time it should improve. It is best to keep the soil moist, with good absorption, to maintain the balance of the soil solution. For calcium deficiency, it is best to use thiazole copper as a root drench, because roots rot easily after calcium deficiency. If only the old leaves are drying out, use Fubaixing brand synergistic calcium. The effect is fairly obvious, and the leaves turn green again quickly.

3. Pesticide and Fertilizer Damage

Use safe, efficient pesticides; do not use pesticides with high toxicity and great harm. Use the specified, suitable concentration, and do not arbitrarily increase the concentration. When spraying pesticides, be careful to spray evenly and do not spray one spot for a long time. Wait until after the safety interval before using them again, and make the interval a bit longer before reuse. Farmyard manure must not be used without fermenting, must not be used in excess, and must not be placed too close to the roots; the amount of chemical fertilizer used must be strictly controlled. When using fertilizers dissolved in water, and foliar fertilizers, pay attention to the concentration, otherwise they can easily burn the plant.

4. Disease Prevention and Control

Some soil-borne pathogen infections cause root rot; after the roots rot, the plant also begins to weaken, and once the roots can no longer absorb, you will notice it. The plant's leaves begin to dry out from the edges. The main control method is root-drench treatment: dig away the soil around the root surface, expose the roots, cut off the diseased roots, then pour on a Chinese herbal fungicide at 300 times dilution together with garlic oil at 1000 times dilution, and afterward cover with new sterilized soil.

Dry, withered edges on apple leaves may be due to the above causes; if so, you can refer to the above improvement methods. There may also be other causes, so analyze the specific situation case by case.