How to prevent and control yellow wilt at the tip of orchid flowers and leaves?

Measures should be taken according to the different causes of the disease.

The reasons for the dry tip are physiological, due to partial nitrogen application, too many young leaves, and decreased stress resistance; There is fertilizer damage caused by spraying fertilizer, the concentration is too high, the application rate is too large, and the siltation of leaf tips; There is dry coke caused by low air humidity; There is frostbite due to winter heat preservation, water vapor siltation of leaf tips, and freezing at too low temperature; There is damage caused by long-term contact between the leaf tip and the pot wall and culture medium; If there is a focus caused by potassium deficiency, it should be avoided as much as possible according to the cause.

The physiological reasons for the dry tip are: due to partial application of nitrogen, the leaves are too young and tender, and the stress resistance is reduced; There is fertilizer damage caused by spraying fertilizer, the concentration is too high, the application rate is too large, and the siltation of leaf tips; There is dry coke caused by low air humidity; There is frostbite due to winter heat preservation, water vapor siltation of leaf tips, and freezing at too low temperature; There is damage caused by long-term contact between the leaf tip and the pot wall and culture medium; If there is a focus caused by potassium deficiency, it should be avoided as much as possible according to the cause.

Pathological ones include scorched tail disease, rust disease, iron cannon disease, etc.

FYI.

Orchid leaf tip drying is the most common problem in our orchid farming, orchids like a warm and humid environment, we are in an environment where the temperature is often unstable, humidity or dry or wet, it is difficult to raise orchids to seal the tip.

Timely shading, auspicious light exposure will make the tips of orchid leaves yellow and dry, and they need to be transferred to a ventilated and cool environment in time for maintenance; Replenish water, the soil is too dry will also make the tips of orchid leaves yellow and dry, and it is necessary to water in time to soak all the soil; Spraying pesticides, after being attacked by aphids and anthracnose, the tip of the orchid leaves will also appear yellow and dry, and the diluted Bordeaux solution needs to be sprayed**.

Orchids are suitable for growing in a ventilated and breathable semi-shady environment, not resistant to strong light exposure, if they are placed in strong light for a long time to maintain, it will make the leaf tips appear yellow, at this time it needs to be transferred to a semi-shady environment for maintenance, and spray water mist around the leaves to improve the humidity of the air, and then give sufficient light after the orchid recovers growth.

Orchids have a greater demand for water during the growth period, if the long-term watering is insufficient, the orchid leaves will dry up and yellow due to lack of water, and it is necessary to water the soil once in time to soak all the soil. If the soil is wet, spray water mist around the leaves to relieve it.

After the orchid is attacked by aphids, anthracnose, leaf blight and other diseases, the leaf tips will also appear dry and yellow. The leaves need to be sprayed with a diluted Bordeaux solution or antibacterial**, which can be sprayed every 2 weeks. Note that in case of high temperature weather, it is necessary to reduce the number of spraying to avoid pesticide damage.

Orchids are suitable for growing in a fertile environment, if they are not repotted for a long time or the nitrogen fertilizer content in the soil is too low, resulting in a lack of nutrients in the soil, the leaves will dry and yellow. It is necessary to change to loose and breathable new soil for cultivation in time, and apply a diluted decomposed liquid fertilizer to alleviate it.

The leaf tips of orchids are yellow, which may be related to light, soil, humidity and moisture. During the curing period, when the light is too strong, the leaf tips will turn yellow after the orchid is burned. After the soil is alkalized and compacted, the root system grows poorly, and the leaf tips will wither and turn yellow.

During the maintenance period, if the moisture is insufficient or the humidity is too low, the orchid will lack water, and the leaves will wither and yellow in the later stage.

The leaf tips of orchids are yellow, which may be caused by too much light. Orchids are more resistant to negative and can adapt to soft sunlight and not adapt to strong light to grow. If the light is too strong during the summer and the orchid is kept outdoors for a long time, the leaf tip will wither and yellow after the orchid is sunburned, which is not conducive to the normal growth of the orchid in the later stage.

Orchids like acidic soil, the soil is alkalized and compacted, and the leaf tips of orchids will wither and yellow. Orchids prefer acidic soils and are suitable for growing in loose and fertile acidic nutrient soils. During the maintenance period, if the soil is not changed for a long time or the orchid is not loosened, the soil will be compacted, and the soil will be alkalized when the orchid is watered with tap water containing chloride ions for a long time.

The leaf tips of orchids are yellow, probably due to a dry climate. Orchids love moisture and are suitable for living in humid climates and can grow better. During the maintenance period, if the climate is too dry and the orchid is not replenished with water in time, the leaf tips of the orchid will wither and yellow.

Orchids may dry up and die if they are left in a dry environment for a long time.

Orchids love moisture and lack of water, which will dry out and turn yellow at the tips of their leaves. During the maintenance period, if the orchid is watered with too little water or the watering interval is too long, the orchid will lack water and the plant will not grow well. Under the condition of insufficient water, the stem of the orchid will dry up, the tip of the leaf will turn yellow and withered, and the leaves will be all yellow in the later stage.

Orchid leaf tip yellowing may be the phenomenon of soil compaction, resulting in damage to the roots of the orchid, or it may be that the orchid is provided with too much water during maintenance, and the water needs to be strictly controlled for the plant, or it may be that the orchid receives too much light during the growth process, resulting in the leaves of the plant being burned by strong light.

1. Soil compaction

The yellowing of orchid leaves may be due to the drying and hardening of the planting soil, resulting in the inability of the roots of the plant to absorb nutrients from the soil, so it is necessary to replace the fertile and loose soil with good drainage soil for the plant and replant it after planting, and after planting, it is also necessary to loosen the soil for the orchid every other week to improve the air permeability of the soil.

2. Overwatering

The yellowing of orchid leaves may also be due to the excessive water provided to the plant during maintenance, resulting in water rot at the roots of the orchid, at this time, it is necessary to loosen the soil for the orchid, drain the excess water in the soil, and then place the plant in a ventilated environment to maintain, and use the wind to evaporate the residual water in the soil.

3. Excessive fertilization

Orchid leaves yellowing may also be the maintenance process for the plant to provide excessive nutrients, resulting in the phenomenon of orchid fertilizer, so in the later maintenance of orchids can provide reasonable nutrients for the plant, it is best to fertilize once every other month, in the fertilization needs to dilute the fertilizer to provide orchids.

4. The light is too strong

Orchids are suitable for growing in a sunny environment, but too strong light will cause orchid leaves to burn and yellow, so in the later maintenance of orchids can provide suitable light for the plant, so that the orchid can grow healthily, and when the light is too strong, it is necessary to shade the orchid in time to avoid burning the plant under strong light.