What should we do when the white palm grows insects? control of common diseases and insect pests of white palm / 6 simple measures

The harm of diseases and insect pests to plants is very great, so when planting white palm, we must pay attention to the problem of diseases and insect pests. What should we do if white palm grows insects? Today, the editor will take you to learn more about the prevention and control methods of common diseases and insect pests in white palm.

What should I do if the white palm grows worms?

In the prevention and control of common diseases and insect pests of white palm, the most common pests are aphids, whitefly, thrips and so on. What should we do when we raise white palm insects? It is particularly important to distinguish the types of pests, take effective pest control measures, and pay attention to late maintenance.

1. Aphids

Symptoms: aphids, also known as greasy worms or honey worms, are about 1.5-4.9 mm long, usually 2 mm. By absorbing juice through needle mouthparts, the stems and leaves of white palms are curled and withered, which often occurs in spring and autumn.

Control measures: ⑴ can use brush to remove aphids, if serious need to cut off branches and leaves; ⑵ can use 50% marathon emulsion diluted to 100x solution spray; ⑶ in accordance with the breeding methods of white palm and precautions for later maintenance.

2. Whitefly

Symptoms: whitefly is a kind of pest with black, red or yellowish wings, with a body length of no more than 3 mm. It is one of the most harmful pests in the prevention and control of common diseases and insect pests in white palms. Its shape is oval or nearly round, and after absorbing the juice of white palms, it will cause it to weaken or even die.

Control measures: ⑴ can clean up the whitefly, you can use a brush or stick; ⑵ can use high temperature suffocation, such as controlling the temperature at 45-48 degrees, humidity above 90%, whitefly will basically die after 2 hours; ⑶ usually pay attention to fertilization should not be too much, the environment should be well ventilated.

3. Thrips

Symptoms: a yellow, brown, or black pest with a body length of about 2 mm that absorbs the sap of the young tissue of the plant, especially young leaves and buds, and causes serious damage.

Prevention and control measures: ⑴ strengthens the management of fertilizer and water, which can promote the growth of white palm and reduce the probability of thrips; ⑵ uses 25% thiazide water dispersible granules diluted to 5000 times solution for root irrigation; ⑶ strengthens late maintenance.

Common diseases of white palm

1. Leaf spot

Symptoms: leaf spot is the most common in the prevention and control of common diseases and insect pests, there will be oval, long light reddish brown spots on the leaves, green circles around them, irregular patches after expansion, and black spots on the spots.

Control measures: ⑴ cut off the diseased tissue and take centralized burning; ⑵ is sprayed with 38% cuproloxil diluted to 1000 times solution, or it can be sprayed with 70% manganic solution diluted to 500x solution.

2. Brown spot

Symptoms: the lower leaves begin to get sick, and then spread upward, showing purple-brown markings at the beginning, showing purple-brown markings, then turning black, and finally withered and yellow leaves, white palms will not blossom.

Control measures: in ⑴ high temperature and humidity weather, we should apply less nitrogen fertilizer, but keep a certain amount of phosphorus and potassium fertilizer, avoid watering in the evening; at the initial stage of ⑵ disease, spraying with Dysen zinc and manganese diluted into 800x solution, once every 5 days, 3-4 times can prevent the disease from spreading.

3. Anthrax

Symptoms: initially produce watery light green spots at the tip or edge of the leaf, then spread along the veins called translucent irregular spots, and finally change from brown to grayish cyan.

Control measures: ⑴ removed diseased leaves; ⑵ was sprayed with 50% carbendazim wettable powder diluted to 1500 times solution, or 25% carbendazim wettable powder diluted to 600x solution for spraying.

Common diseases and insect pests of white palm and their control

Common diseases of white palm

Brown spot disease

Brown spot is caused by Phytophthora and mainly exists in soil. The pathogen invaded the plant from the base of the stem, at first, the leaves appeared waterlogged disease spot, gradually turned brown, rotted in the later stage, and the whole plant wilted. The specific prevention and control measures are as follows:

① was treated with Dysen zinc and manganese at the initial stage of the disease, once every 4-5 days, 3-4 times continuously, which could effectively control the spread of the disease.

The mixed spray of 1500 times of enamylmorpholine and 1000 times of aldicarb hydrochloride for ② can effectively prevent brown spot and quenching.

Root rot disease

Fungal diseases, bacteria can infect roots, stems and leaves. Infecting the root will cause the root to rot. When infecting leaves or stems, brown spots are first produced. With the expansion of the disease, the leaves will wither and fall off, and in severe cases, the plant will die. The prevention and control methods are as follows:

① found that the root rot immediately clean up the diseased plant, if the root rot is mild, remove the rotten part, replant, and throw away the serious ones directly. Clean up the dead leaves in time to avoid infecting other plants.

During the onset of ②, the root was irrigated with 1000 times solution of Gen Fu Ling.

Common insect pests of white palm

Aphids

Aphids mainly absorb juice through needle-like mouthparts, causing the stems and leaves of white palm to be deformed or curled. There are many suitable pesticides, such as dimethoate, omethoate, aphid lice, permethrin and so on. Spray insecticides in time when pests are found, and scrape them off with bamboo slices when a small amount of pests are found.

Thrips

When thistle pests occurred, the leaves of the plants shrunk, the growth was slow, and the internodes of stems were shortened. Thrips are afraid of strong light and do harm in backlit places. It only moves on the surface of the host on cloudy days, morning, evening and night, which is one of the reasons why thrips are difficult to control.

When killing thrips, it is usually carried out at night or early in the morning, and spraying is ineffective if the insect body is not seen during the day. The commonly used agents are acetamiprid, Wanling, imidacloprid and so on.

The reason why white palm does not blossom treatment methods of diseases and insect pests of white palm

Many flower friends reflect that the leaves of white palms planted by themselves do not blossom, what are the reasons why white palms do not bloom, and what are the ways to encounter diseases and insect pests? Next, let's learn and learn together.

The reason why the white palm does not blossom

1. The long-term light is too dark, the growth is weak, and it is not easy to blossom. If the sun is too strong and direct, the leaves may turn yellow.

2. White palm grows rapidly. Generally, the plant will be full in 1-2 years, and the leaves will be crowded and difficult to blossom. Therefore, it is necessary to change the basin in time, and it is usually more appropriate to put it in the half shade after changing the basin.

3. It requires high humidity, it is not conducive to blossom when the air is too dry, and each watering should be sufficient to keep the basin soil moist.

4. long-term non-fertilization is not conducive to the healthy growth of plants. During the growth period from May to September, some granular compound fertilizers are applied every month, which will not only grow leaves but also bloom.

5. Its flowering needs to be induced, and the method is to spray gibberellic acid to induce plant flowering artificially, and the flowering time varies with different varieties.

6. The sandy loam with loose, good drainage and rich humus is required.

The flowering of Taro is not only the cause of light, but also needs to be induced. The method is to spray gibberellic acid to induce plant flowering artificially, and the flowering time varies with different varieties. The response of small varieties to gibberellic acid was fast, and it could blossom in 7-9 weeks after spraying, 10-11 weeks for medium-sized varieties and 12-13 weeks for large varieties. It should be noted that too high concentration of gibberellic acid will cause plant flower deformation, generally between 1000-1500 times.

With regard to light, when the light is strong, it is raised by semi-overcast or scattered light, and it is best to give sufficient light conditions in winter, which is not only conducive to thick green leaves, but also conducive to overwintering.

Treatment methods of diseases and insect pests of white palm

(1) Control of bacterial leaf spot, brown spot and anthracnose: the main damage to leaves can be sprayed with 50% carbendazim wettable powder 500 times.

(2) Prevention and control of root rot and stem rot: in addition to paying attention to ventilation and reducing humidity, control with 75% chlorothalonil wettable powder 800 times. Sometimes the harm of shell insects and red spiders occurs, which can be prevented by spraying 1500 times of 50% marathon EC.

(3) the control of scale insects: the methods are wiping with a dishcloth, spraying 500 times liquid of wind oil or washing powder, spraying phosphorus, lice scale ning, Guoguang scale, etc., and the effect is good.

Generally poor ventilation is easy to suffer from this pest, shell insects suck the juice of flowers and plants, generally do not move, wipe removal is death, is the most environmentally friendly method, but must be wiped clean.