African violet long insects how to do, African violet pest control/2 insects 3 diseases

As a beautiful flower, African Violet has many effects. It not only looks good, but also repels mosquitoes and beautifies the home. But when raised indoors, plants usually grow worms and get sick because of poor environment and improper maintenance. What about African violets with worms? The above are several common pest control of African violets, let's go and have a look!

I. African violets grow worms

In fact, it is not easy to grow insects and get sick when raising African violets indoors, but when operation errors lead to high air humidity, insufficient light, and poor ventilation, it is also prone to diseases and insect pests such as Fusarium wilt, powdery mildew, leaf rot, shell insects and red spiders. They will seriously affect the ornamental of the plant. In this regard, we should spray prevention and control in time after discovery.

II. Pest control of African violets

1. Scale insects

Scale insects, the main pest of African violets, generally occur in poorly ventilated and poorly lit environments. The insect generally floats and attaches to the surface of the plant leaves, and the secretions contaminate the leaves and cause the yellowing and shedding of African violets.

Control methods: Rice vinegar can be used when shell insects are few, rice vinegar can be soaked with water cotton balls, and damaged leaves can be lightly rubbed to wipe off the shell insects; when there are too many shell insects, 40% omethoate 1000 times solution can be sprayed for control, once a week, 2 or 3 times in a row.

2. Red spider

To say that African violets grow worms, red spiders also need to pay attention. It uses mouthparts to pierce the leaves of African violets to suck juice, so that the chlorophyll of the plant is destroyed, the leaves show gray-yellow spots or patches, and the leaves become withered and yellow, or even fall off.

Prevention and treatment: usually should pay attention to the observation of flowers, found that the above symptoms, timely check the back of the leaves. When individual leaves are damaged, insect leaves can be removed; when more leaves are damaged, propargite, dicofol, dimethoate, Huachongjing and other drugs should be sprayed as soon as possible to control them.

3. Fusarium wilt

In addition to insect pests, African violets are also infected during growth, the most common of which is Fusarium wilt, a plant disease caused by fungi or bacteria. There are several symptoms of the disease: severe spots, wilting or the death of leaves, flowers, fruits, stems or whole plants.

Prevention and treatment methods: after discovering the above symptoms, you can spray wilt Rick 600 times 800 times liquid, 50% carbendazim 600 times liquid, and so on. And the diseased branches were cleared and burned in time to reduce the source of the disease.

4. Powdery mildew

Powdery mildew, another disease of African violets, mainly harms leaves, tender stems, flower buds and buds. After suffering from the disease, the diseased leaves will appear a lot of white dust-like disease spots, which very affect its photosynthesis, and even lead to plant death over a long time.

Prevention and treatment methods: when the above diseases are found, the seriously diseased plants or seriously diseased parts should be cut off in time and burned centrally to reduce the source of the disease; at the initial stage of the disease, 50% carbendazim wettable powder 800 times solution, 80% Dysen zinc 500 times solution, 75% chlorothalonil 500 solution can be sprayed for prevention and treatment, and the effect is better alternately.

5. Leaf rot

When it comes to the disease of African violets, there is another disease that can not be ignored, which is leaf rot. After suffering from the disease, the diseased leaf will appear waterlogged disease spot, the disease spot around the halo; in the later stage, the disease spot expansion speed, the emergence of deep and shallow concentric wheel striated disease spot.

Prevention and treatment methods: when the above diseases are found, 72% agricultural streptomycin sulfate soluble powder or 4000 times solution of neophytomycin should be sprayed in time for prevention and treatment. In order to prevent drug resistance, you can take turns spraying once every 10 days, even prevention for 2 or 3 times can be effective.

What about African pansy aphids? control of common diseases and insect pests of African pansy / spraying of 3 insects and 4 diseases

In the indoor breeding of Corydalis, we need to master some maintenance skills and pest control. I don't want to say much about the skills of raising African pansy here. I believe everyone has mastered it. Next, let's talk about diseases and insect pests. While African pansy is most likely to produce aphids, what about African pansy aphids? The following are several common pest control of Corydalis, let's go and have a look.

What about African pansy aphids? spray them with medicine.

Because the operation error leads to high air humidity, lack of light and poor ventilation, Corydalis is prone to aphids, which will harm young leaves and stems, absorb juice and affect the normal growth of plants. Prevention and control methods: if there are few aphids, you can brush off the bugs with tools such as brush; if there are many aphids, you can spray 2.5% fish rattan essential EC 1200 times for control, which can be effective after several consecutive sprays.

II. Prevention and control of common diseases and insect pests of Corydalis

In addition to aphids, there are 6 kinds of common diseases and insect pests, including red spiders and shell insects, leaf spot disease, root-knot nematode disease, white silk disease and blight, which will seriously affect the ornamental of the plant. In this regard, we should spray prevention and control in time after discovery.

1. Red spider

When it comes to African pansy worms, the red spider also needs to pay attention. It uses mouthparts to pierce into the leaves of African pansy to suck juice, so that the chlorophyll of the plant is destroyed, the leaves show gray-yellow spots or patches, and the leaves become withered and yellow, or even fall off.

Prevention and control methods: for red spiders, we should always guard against, at best pay attention to observation, when the above symptoms are found, check the back of leaves in time. When individual leaves are damaged, insect leaves can be removed; when more leaves are damaged, propargite, dimethoate, Huachongjing and other drugs should be sprayed as soon as possible to control them.

2. Scale insects

Generally speaking, in the environment of poor ventilation and poor light, African pansy is easy to produce beetles. The insect generally floats and attaches to the leaf surface of the plant, and the secretion pollutes the leaves, which can also cause the leaves of Corydalis to yellowing and falling off.

Control methods: when there are few shell insects, soak the rice vinegar with water cotton balls and gently rub the damaged leaves, the shell insects can be wiped off and killed; when there are too many shell insects, 1000 times of omethoate can be sprayed for control, once a week, two to three times in a row.

3. Leaf spot

When the indoor temperature fluctuates greatly in a short period of time, or too much watering during the dormant period, African pansy is easy to suffer from leaf spot disease. The disease mainly causes damage to the lower leaves of Corydalis. There are many small brown spots on the diseased leaves, which can spread throughout the leaves in severe cases.

Prevention and treatment methods: when the above diseases are found, remove the diseased leaves in time and destroy them centrally in order to reduce the source of the disease; then carbendazim, chlorothalonil and methyl thiophanate are sprayed on the leaves, once every 7-8 days for 2-3 times in a row, which can be basically cured.

4. Root knot nematode disease

Another disease of African pansy, it is a root disease caused by root-knot nematode. After suffering from the disease, verrucous root nodes of different sizes will be produced on the fibrous root and lateral root of African pansy. In addition, the disease can also lead to plant dwarfism and stunting.

Prevention and control methods: the disease is mainly prevented. Before planting, 15 grams of carbofuran granules with a concentration of 3% are evenly applied in the basin soil, then covered with 10 cm thick soil, and then poured through water, which can generally remove a variety of pests.

5. White silk disease

Corydalis is easy to suffer from white silk disease when the environment is hot and humid, soil water is stagnant, ventilation and light transmission is poor. The disease mainly harms the stem base and roots of Corydalis, causing purple-brown spots on the leaves, followed by obvious white mycelium, and in severe cases, the plant withered and eventually died.

Prevention and treatment methods: after the above diseases were found, fungicides such as carbendazim, Bordeaux solution and Bomite sulfur mixture were sprayed on the stem base and substrate in time. In addition, the disease can be sprinkled with lime powder, once every 15 days, 2-3 times can be cured.

6. Epidemic disease

In the prevention and control of common diseases and insect pests of Corydalis, we should pay special attention to the epidemic disease. The disease mainly harms the leaves and the ground of Corydalis, resulting in water-immersed spots on the diseased leaves, then quickly expands to black-brown rot, and causes fallen leaves, sometimes with a thin white mildew layer on the damaged surface of the leaves.

Prevention and treatment: cut off the diseased leaves in time and burn them or bury them in soil in order to reduce the source of the disease. When the disease occurs, it can be prevented and treated by spraying metalaxyl, aluminum ethyl phosphate, killing alum and other agents.

With regard to the prevention and control of common diseases and insect pests of Corydalis, the editor has introduced this. I believe you should know how to do it when you encounter African pansy worms or get sick again. Generally speaking, African pansy is not difficult to raise, as long as everyone can maintain it according to the breeding method of African pansy. Only in this way, the bug will not find the door, and finally wish everyone's African pansy can grow beautiful ~

Pest control knowledge of African violets

Pest control knowledge of African violets

Pest control: Fusarium wilt, powdery mildew and leaf rot are easy to occur under high temperature and humid conditions. 1000 times of acetic acid solution can be used to spray or pour into the basin soil. Scale insects and red spiders often harm African violets during the growing period and can be sprayed with 1000 omethoate EC.

Sick African violets show different symptoms in different parts, such as flowers that may lead to non-flowering, deformity, premature death, unclear colors, reduced numbers, decay, and so on. The leaf tissue appeared deformity, curl, yellowing, discoloration, brown spot and decay, etc. The stem part has overgrowth (Internode lengthening), browning, decay, insects, parasitism and so on. Browning and discoloration of roots, decay or parasitism of insects and bacteria, etc. The diseases of African violets can be divided into two categories according to the causes (causes):

(1) physiological diseases-the causes of physiological diseases include: environmental factors such as too low or too high temperature, too low or too high humidity, discomfort of light sources and air pollution, cultivation techniques such as improper watering, improper basin change, poor physical and chemical properties of the medium, improper use of pesticides, growth regulators and fertilizers, etc.

The key points for the prevention and treatment of physiological diseases are to learn correct environmental management and cultivation techniques, to understand various symptoms and to make correct disease diagnosis, and to improve environmental factors or cultivation techniques according to disease diagnosis. Physiological diseases are not contagious, and most plants can recover as long as their environmental factors are adjusted at the initial stage of occurrence.

(B) Infectious diseases-can be divided into insect pests-the common ones are red spiders, aphids, shell insects, root powder shell insects, thrips, and so on. Although these pathogens are small, they are visible to the naked eye; diseases-pathogens include viruses, viroids, bacteria, fungi and nematodes. Diseases caused by plant pathogens are contagious, so as long as one of the plants is sick, it may infect the plants in the whole cultivation area.

Therefore, in order to avoid the occurrence of infectious diseases, the original plants should be isolated for at least one month. If they are not infected, they should be moved to the cultivation area for planting. Once diseased plants are found, they must be isolated immediately, and pesticides should be sprayed or discarded directly. At the same time, in order to prevent the re-spread of pathogenic plants, it is best to spray pesticides in the whole region; utensils and media that have come into contact with diseased plants must be sterilized or discarded.

Common Fusarium wilt, powdery mildew and leaf rot can be sprayed with 65% Dysen zinc wettable powder; pests include red spiders and powders, which are sprayed with 2000 times of 40q dimethoate EC.