The leaves of Milanese flowers have yellow mud like markings Can be cut off Part of the infection La

My hometown here and this is called fire sand, it is a kind of insect, just spray some medicine, in addition to tell you a little common sense to rub the leaves with beer every week, the plant will become oily and very nutritious.

It's a scale worm. Emidacloprid.

It seems to be powdery mildew, and sulfur powder and other sulfur are effective agents for the prevention and treatment of powdery mildew.

Leaf spot disease, lack of nitrogen fertilizer, go to the flower shop to buy a bottle of plant growth nutrient solution, add some nutrient solution every time you water, and spray potassium dihydrogen phosphate frequently

Pests and diseases are the infestation. Leaf spot disease caused by fungi and other pathogens is easy to cause local necrosis of leaves, yellow spots or plaques appear, and in severe cases, the whole leaf withers yellow and falls off, and yellow-green mottled spots appear on the leaves after being infected by mosaic virus; Suffer from scale insects, red spiders, etc.

Prevention and control method: spray 40 dimethoate 1000 1500 times liquid; In addition to scale insects, other pests can also be sprayed with 2 5 deltamethrin 2500 3000 times; To control red spiders, you can also spray 20 dicofol 1000 times.

I hope that the landlord's Milan will be more beautiful as it grows

Analysis of the causes of leaf loss in Milan and treatment methods.

1. Watering: Too much watering causes the roots to be unable to breathe and suffocate the roots. Water cannot be conducted to the leaf surface.

At first, the lower leaves are curled, dried up, and turn brown and fall off, which in turn causes the upper green leaves to fall off in a short time. Long-term lack of water will lead to the death of the root system, and if you water it thoroughly at this time, a large number of leaves will fall in a short period of time and the plant will die. Watering should be strictly in accordance with the "see dry and wet", do not dry and do not water, watering thoroughly.

Basically, it is watered twice a day.

2. Fertilization: Milan flowers have certain requirements for fertilizer, especially in the growing period to have enough fertilizer, if the fertilizer is insufficient, it will also cause the leaves to turn yellow and fall. Fertilization should master the principle of thin fertilizer and frequent application, especially when topdressing begins in spring, avoid applying thick fertilizer.

Top dressing should be applied once every 7 10 days, and an appropriate amount of superphosphate should also be added in the fertilizer water, which is conducive to the growth of Milanese flowers.

3. Light: Milan flowers like light, generally placed in bright scattered light to cultivate, if placed in the room is dark, it will affect the growth of Milan flowers, resulting in yellowing and leaf loss. Milan should be placed in a ventilated place with scattered light.

You can see the morning light every day, and you can move indoors at noon when the sun is high. See the sunset when the sun is about to set. This process can last about half a month, allowing Milan to have an adaptation process.

4. Pests and diseases: leaf spot disease caused by fungi and other pathogens is easy to make the leaves partially necrotic, yellow spots or plaques appear, and the whole leaves are yellow and fall off when they are serious, and yellow-green mottled spots appear on the leaves after being infected by mosaic virus; Suffer from scale insects, red spiders, etc. It can be sprayed every 15 20 days with 25 30 times of dry and pure plant ash mixed with superphosphate to extract the clarification solution, or lime water clarification solution for pollution-free prevention and control, so as to protect the branches and leaves and prevent various pests and diseases.

Falling leaves may be more water, Milan is afraid of the soil is wet, watering to see dry and wet do not water too much.

The method of saving the yellow leaves of Milanese flowers is as follows:

1. Appropriate lighting.

Milan in the process of growth, can not do without sufficient sunshine conditions, if the light is insufficient, it can not carry out normal photosynthesis, resulting in chlorophyll can not be formed, there is a yellowing of the leaves to fall off, at this time to move it to the astigmatism environment, to ensure that the daily light time in more than 6 hours.

2. Reduce watering.

Milan leaves yellowing and falling off may also be due to frequent watering, the humidity of the soil is too large, which will lead to a lack of oxygen in the roots of the brigade, so that the yellow leaves, at this time to stop watering, in the later breeding process, in order to keep the potting soil slightly dry, the rainy season to move the potted plants to a dry place.

3. Irrigation and fertilizer.

After applying thick fertilizer to Milan, there will also be a large area of yellow and falling leaves, at this time, you can water a large amount of water at the roots, dilute the fertilizer, and then loosen the soil, the fertilizer is discharged, and a thin fertilizer should be applied at an interval of 1-2 months in the later stage. Split your fingers.

4. Insect pests.

The yellowing and shedding of Milanese leaves may be the cause of pest erosion, common aphids, red spiders, etc., after the eggs are found, you can spray Milan with a concentration of 50% Bordeaux or dimethoate 200-500 times.

1. Strong light exposure.

Milan is a light-loving plant. Although it prefers to be light-simple, it is afraid of being exposed to the sun. Especially in summer, direct sunlight can easily cause yellow spots on leaves, so proper shade should be given.

Plants are usually placed in semi-shade to receive scattered light, but they can be exposed to the sun every morning and evening. In addition, shade nets can be installed to reduce damage from direct light.

Second, the soil is unsuitable.

Milan, like most plants, prefers loose and fertile soil. If the soil hardens, it is easy to affect the respiration of the root system, and it will also hinder the penetration of water, which is not conducive to the growth of plants, resulting in yellowing of leaves. In this case, it is necessary to change the potting soil in time, loosen the soil appropriately, take out the plants, and replace them with new soil for supplementation and closure.

3. Excessive water and fertilizer.

Milan needs a lot of water and fertilizer during the growth process, but if it is excessive, it can also affect its development, resulting in root rot and yellow leaves. In daily maintenance, we must control the amount of water and fertilizer to ensure that the soil in the pot is moist and not wet, and the fertilizer should be diluted before application. If the roots are rotten, they need to be pruned after unpotting and then planted with new soil.

Fourth, pest and disease erosion.

Milanese leaves turn yellow when eroded by pests and diseases. For various diseases, it is often necessary to prune diseased branches and leaves first to prevent infection**, and then spray**. For pests, in addition to manual capture or phototaxis trapping, it can also be controlled by spraying.