How to control evergreen insect pests?

1) Leaf spot. The disease occurs on evergreen leaves, and it is easy to occur in humid weather. The lesions are brown at first, water-soaked and greenish around the periphery, and expanded in the form of a whorl, round to oval, with brown margins and grayish-white inside.

In the later stage, black-brown mold spots appear in the center of the lesions, and under humid conditions, they become black-brown mold layers. The way to prevent and treat this disease is to remove the diseased leaves in time; Bordeaux solution (or 50% carbendazim 1000 times solution) can be sprayed in the early or late stages of the disease.

2) Anthrax. The disease also occurs on evergreen leaves, and in severe cases it can spread to petioles. The lesions appear as water-soaked small yellow spots in the early stage, and after expansion, they are oval to irregular brown or yellow-brown with a slight ring pattern, and in the later stage, the lesions are connected into a dry form and produce small black spots arranged in the ring pattern.

This disease is mainly due to poor ventilation and beneficial to the occurrence of scale insects. The way to prevent and control this disease is to strengthen maintenance, increase phosphorus and potassium fertilizers; At the beginning of the disease, it can be sprayed with the same amount of Bordeaux solution (or 800-900 times of 60% zebzeb zinc, or 1500 times of 70% Tobuzin).

3) Brown soft scale. This insect has complex feeding habits and can harm many plants, and evergreen is one of the damaged flowers. When the brown soft scale harms the plant, it generally gathers on the leaf surface or young leaves, sucks the sap of the plant, and excretes mucus at the same time, and its excrement is easy to cause a large number of coal pollution pathogens, so that the stems and leaves turn black, affect the photosynthesis of the plant, cause weak growth, yellow leaves, and hinder ornamentation.

When it is severe, the branches and stems are covered with insect bodies, causing the plant to wither and yellow, affecting the growth.

The disease of evergreen.

Leaf spot. Leaf spot is a common disease of evergreen, and it is generally more likely to occur during the rainy season.

When leaf spot disease appears, it will grow lesions on the leaves, and gradually expand, the surrounding color of the lesions will become lighter, and in the later stage of leaf spot, the disease will be more serious and turn black-brown.

If evergreen leaf spot disease occurs, it is necessary to remove the diseased leaves in time, and when the disease is more serious, it can be sprayed with 1000 times of 50% carbendazim**.

Anthrax. Anthrax is also a common disease of evergreen, mainly on the leaves, and can develop to the leaves when it is severe, so that the plant appears water-stained lesions, and when it is severe, the lesions will become a piece and black spots appear.

The occurrence of anthrax is mainly caused by poor ventilation, so it is necessary to strengthen ventilation during the maintenance period and control scale insects. In the early stage of the disease, it can be sprayed with 60% of 800 times of zebzein, or 70% of 1500 times of Tobuzin.

Evergreen insect infestation.

Brown soft scales. Brown soft scale is more harmful to evergreen, generally brown soft scale will gather on the leaves of Guangdong evergreen, suck the sap of the plant, and will discharge mucus to cause a large number of pathogens, resulting in black stems and leaves, poor plant growth, and yellowing of leaves. In more severe cases, the plant will be infested with pests.

Generally, in the early stage of the occurrence of brown soft scale, there are fewer pests, and the pests can be scraped directly, but after the nymphs hatch, they need to be sprayed to kill the insects, and generally can be sprayed with 1000 times of 40% dimethoate EC or 1000 times of 40% oxidized dimethoate EC.

Hello friends, under normal circumstances, you can go to the flower market to have a look, there are plant pesticides, you can spray to get rid of insect pests.

Summary. Hello, pro more watering the foliar surface loses its due luster, and the leaves droop like dehydration. At this time, the flowers and leaves should be moved to a place with higher temperatures, so that it gradually returns to normal.

Be careful not to increase the temperature abruptly after damage to avoid wilting of the leaves. Mild: In addition to drooping, the leaves of evergreen will be scalded by boiling water.

When processing, cut off the cold spots on the leaves and move the flowers to a warm place. Moderate: Most of the leaves of the mosaic evergreen show cold spots, and the petioles appear water-stained patches and lose green.

At this time, the leaf should be cut off with the stalk, and the wound should be smeared with plant ash or soot, and then put it in a warm place, and the watering should be properly controlled to make it slowly return to normal. Severe: The new leaves of the young shoots lose green, showing water-stained patches, and the underground root system is cold and rotten.

The remedy is to dig up the plant in time, cut off the underground part, cut off the damaged branches and stems, apply the wound with plant ash, store it in moist plain sand, and take cuttings after the beginning of spring.

Evergreen sprayed herbicide and the leaves withered, and it took a long time.

Hello, pro more watering the foliar surface loses its due luster, and the leaves droop like dehydration. At this time, the flowers and leaves should be moved to a place with higher temperatures, so that it gradually returns to normal. Be careful not to increase the temperature abruptly after damage to avoid wilting of the leaves.

Mild: In addition to drooping, the leaves of evergreen will be scalded by boiling water. When processing, cut off the cold spots on the leaves and move the flowers to a warm place.

Moderate: Most of the leaves of the mosaic evergreen show cold spots, and the petioles appear water-stained patches and lose green. At this time, the leaf should be cut off with the stalk, and the wound should be smeared with plant ash or soot, and then put it in a warm place, and the watering should be properly controlled to make it slowly return to normal.

Severe: The new leaves of the young shoots lose green, showing water-stained patches, and the underground root system is cold and rotten. The remedy is to dig up the plant in time, cut off the underground part, cut off the damaged branches and stems, apply the wound with plant ash, store it in moist plain sand, and take cuttings after the beginning of spring.

l not from the basin, but on the outside on the earth.

All the same pro.

Is there any medicine spray that can be better.

Clean up any remaining medicine first.

How to clean it up after a long time.

If you want to save the life of the 10,000-year-old green wither, the following prevention and control methods should be adopted: Watering should master the principle of "not drying, not watering, watering thoroughly", and every watering must be watered thoroughly. Frequently loosen potting soil to improve its air permeability.

Cut off the old and yellow leaves in time to avoid mutual infection. If the symptoms are severe, they should be poured out of the pot, the dead roots should be cut off, the roots should be rinsed in clean water, and then planted with new soil. Potted plants should be placed in a slightly moist and well-ventilated place in the semi-shade to protect them from the scorching sun.

When it is below 0 in winter, you should move to a well-lit place indoors to avoid frost damage.

Evergreen insects can be cut off the diseased leaves, when the insect pest is not serious, fungicides can be used to spray, commonly used are methrin, monocrotophos EC, dimethoate EC, etc., in accordance with the instructions combined with the condition in proportion to the preparation, and sprinkler irrigation on the diseased leaves, serious diseased leaves should be cut off in time to avoid infection to the whole plant.

1. Spray the agent

If you find that evergreen has insects, you can use the agent to spray, spray to ensure that each leaf is sprayed, there is no insect leaves can also play a preventive role, commonly used agents are metethrin, monocrotophos EC, dimethoate EC, etc., when spraying, pay attention to the preparation in accordance with the instruction manual, accurately grasp the concentration.

2. Cut off diseased leaves

Evergreen insect pests serious leaf limbs Bi Shenzi should be cut in time, after cutting can reduce the risk of the spread of pests and diseases, diseased branches and leaves in the subsequent growth, it is also very likely that the growth is not good, early pruning can effectively protect, too long the disease is easy to spread to the whole plant, when the insect spreads to the whole plant, the probability of success is very small.

3. Proper lighting

Evergreen in the breeding to ensure proper light, it is best to place it in the position where the sun rays can shine, summer or after the rain the sun rays will be strong, you can carry out proper shading, to prevent the sun's rays from burning the evergreen leaves, long-term lack of light of the evergreen leaves are easy to grow insects and dry up.

4. Timely prevention and control

When breeding evergreen, you can use insecticides to spray it before its growing season, which can play a good preventive role, followed by paying attention to the ventilation of the environment during maintenance, if the leaves of the plant are denser, you can also carry out appropriate pruning to ensure that the leaves of the plants can be effectively ventilated, and can also reduce the risk of infection.

The disease of Guangdong evergreen.

Leaf spot disease which Qing erected.

Leaf spot is a common disease of evergreen plants in Guangdong, which is prone to occur in the rainy season. When leaf spot disease appears, it will grow on the leaves and gradually expand, and the color around the spot will become lighter. In the later stages of leaf spot, the disease will be more severe and turn dark brown.

If leaf spot disease occurs in Guangdong evergreen, the diseased leaves should be cleaned up in time. When the condition is severe, 50% carbendazim 1000 times can be sprayed for treatment.

Anthrax. Anthrax is also a common disease in Guangdong, mainly on leaves. In severe cases, it can develop onto the leaves, causing the plant to develop water-stained lesions.

In severe cases, the lesions will turn into patches and black spots will appear. The occurrence of anthrax is mainly caused by poor ventilation, so ventilation should be strengthened during maintenance to prevent scale insects. In the early stage of the disease, 60% zebsen 800 times or 70% tobuzin 1500 times can be sprayed to prevent and control.

Guangdong evergreen insect infestation.

Brown soft scales. Soft brown scales are very harmful to Guangdong evergreen. Generally, soft brown scales will grow on the leaves of Guangdong evergreen, absorb the sap of the plant, discharge the mucus, and cause the bacteria to multiply in large numbers, resulting in black stems and leaves, poor plant growth, and yellowing of leaves.

In the case of heavy plums, the plants will be covered with pests. Generally, in the early stage of soft scales, there are fewer pests, and the pests can be scraped directly. But after the nymphs hatch, it is time to spray.

Generally, it can be sprayed with 1000 times of 40% dimethoate EC or 1000 times of 40% oxidized dimethoate EC.