What to do if the edges of the osmanthus leaves are dry and the new leaves are uneven

If it does not affect the growth, lack of organic matter and some trace elements, if it affects the growth, spray two or three times of detoxification leaf spreading suspension fertilizer.

This is a leaf blight that causes the leaves of osmanthus to dry up and change color from the edges, tips and leaves, until the whole leaf falls off. In particular, potted osmanthus is planted in a high-temperature, sultry, humid, and poorly ventilated environment, which is prone to this leaf blight.

Therefore, raising osmanthus potted plants, can not let the pot soil often accumulate water, dry and then water through, maintain a good ventilation environment, indoor breeding every day to open the window ventilation, air convection.

For blackened leaves to be removed and thrown away in time, carbendazim or methyl tropic wettable powder can be used, according to the instructions, spray once a week, spray two or three times will make a difference.

There is also a blight, which often has small light brown spots on the edges and tips of the leaves, which gradually expand, making the leaves discolored and black. It is also high temperature and high humidity, and it is easy to produce in unventilated places.

In autumn, the leaves of the pests and diseases are thoroughly cleaned up, the diseased leaves are removed, and then the ventilation and light are increased, if the soil for planting osmanthus is relatively poor and compacted, it can be replaced with fertile and loose and well-drained soil in autumn, apply some organic fertilizer, potassium fertilizer, and do not plant too much too dense. Spray some carbendazim or something, and you'll be fine with it.

The tip of the osmanthus leaf turns black is sick, it is likely to be caused by leaf blight, first find the cause of the disease, and then do a good job of prevention at the time of the onset, and stop the loss in time after the onset of the disease, and slow down the damage.

Analysis of the causes of the blackening of the leaf tips of osmanthus trees and their solutions.

1. The reason for the blackening of the tip of the osmanthus leaf bud:

from osmanthus leaf blight;

Osmanthus leaf blight is a plant disease that occurs on osmanthus leaves. The disease generally occurs on the leaf edge and tip of osmanthus leaves, which can dry up one-third to one-half of the whole leaf, and then make the whole leaf necrotic and fall off.

Second, the transmission route of osmanthus leaf blight:

The pathogen overwinters in diseased leaves and diseased defoliation with hyphae or conidia, and the conidia are spread by wind and rain. The optimal temperature for the development of pathogens is about 27. Potting plants can be seriously ill when they are hot, humid, poorly ventilated, or when the plants are weak.

The disease occurs more often on the old leaves after winter. It occurs more often in the lower leaves of the plant.

3. Prevention and control methods:

1. Reduce infestation**.

Diseased plants should be removed in time to block infection**. Thoroughly remove diseased fallen leaves in autumn. Potted osmanthus should be removed from diseased leaves in time.

2. Strengthen cultivation management.

Choose fertile, well-drained soil or substrate for planting osmanthus; increase the application of organic fertilizer or Bicard microbial agent and potassium fertilizer; The planting density should be appropriate to allow ventilation and light transmission, reduce foliar humidity and reduce the occurrence of diseases.

3. Scientific use of pesticides for prevention and control.

At the beginning of the disease, spray 1:2:200 times of Bordeaux liquid, and later spray 50 carbendazim wettable powder 1000 times or 50 benzelat wettable powder 1000 to 1500 times.

In the seriously ill area, the seedlings should be soaked and disinfected with 1000 times potassium permanganate solution when they are out of the nursery.

Because the environment we maintain is very poorly ventilated, poor ventilation, no matter what soil you use, the soil is not dry for a long time, and the soil is not dry after watering, which will inevitably cause root rot.

The leaves of osmanthus have appeared to slowly dry up, to deal with it in time, you can try to save the osmanthus tree through the following five methods.

1. Reasonable lighting.

Osmanthus is a sun-loving plant, when the leaves of osmanthus are dried up, the first thing to consider is the problem of light, if the light is too little will affect the photosynthesis of the leaves, resulting in the yellowing and drying of the leaves, so it is best to ensure that there are 6 7 hours of light time every day, and the strong light season can be shaded for a short time.

2. Watering to keep it moist.

Osmanthus is easy to grow in a moist environment, the breeding process to ensure that the daily water is sufficient, if the watering is insufficient, it will lead to soil agglomeration, which will lead to the phenomenon of yellowing of the leaves, it is best to increase the water every day, remember not too much, hot climate to often spray water on the leaves.

3. Appropriate amount of fertilization.

Osmanthus is a kind of fertilizer-loving flowers, if the fertilizer is insufficient, it will lead to poor plant growth, resulting in the phenomenon of dry and withered leaves, so fertilization should not only be based on organic fertilizer, but also a small amount of potassium fertilizer and compound fertilizer solution should be added appropriately to ensure the growth of roots.

4. Control the temperature.

Osmanthus is easy to grow in a warm environment, its growth temperature base model is about 15 28, if the temperature is low or high will lead to poor leaf growth, the phenomenon of dry withering and falling, should be placed in the hot and high temperature season in the semi-yin and semi-yang environment, and the winter can be maintained indoors.

5. Turn over the pot and change the soil.

Osmanthus is easy to grow in the fertile soil with strong porosity and rich organic matter, if the soil is agglomerated or rotten roots will cause the leaves to dry up, it is best to re-match the soil in time, and when changing the soil, it should be combined with pruning, remove the old soil on the old roots, fibrous roots, dead roots, and then add a small amount of gravel in the pot.