Pest control of thousand-petal sunflower

Sunflower with thousand petals is a kind of compositae, also known as dwarf sunflower. Originated in North America, it has spread all over the world. The flowers of a thousand-petal sunflower are double petals, as golden as sunflower. Commonly used in courtyard greening, it can also be used as ornamental potted plants. It will inevitably suffer from some pests and diseases during its growth, but how to prevent and control pests and diseases, let's learn now.

I. Pest control

Besides common needle worms and scarabs, there are grubs, cutworms, meadow moths and even sunflower moths. After encountering insect pests, stems, leaves and flowers will all suffer. Special chemicals can be prepared and sprayed directly on plants. If nuts are damaged, spray omethoate directly on the flower tray after the tubular inflorescence withers.

Second, about the prevention and control of diseases.

1. Besides rust, Sclerotinia sclerotiorum is the most important disease of Malvaceae. In addition, parasitism is also a common disease encountered by mallow. First of all, rust is caused by fungi, which will be encountered from seedling to maturity. Generally, you can choose to plant plants that are naturally resistant to disease and prevent rust through rotation. When symptoms appear, you can choose to apply potassium fertilizer to this flower. If it doesn't work, you can also treat its stems and leaves with 25% Weixiuling 2000 times solution. In addition, spraying the emulsion-like high-fat film every 10 day after flowering 150 ~ 200 times can also prevent rust.

2. Sclerotinia sclerotiorum, also known as rot fungus, mainly harms stems, vines, leaves and discs. Can be mixed with plant ash, etc. , scattered around the roots. The disease should be prevented and treated mainly in the middle and early stages of the disease. As long as the disease is found, it is necessary to remove the diseased branches, leaves, flowers and fruits in time. If the condition is serious, you can also use the method of disinfection first and spraying the next day.

3. Orphanin is a flowering parasitic plant, which is usually parasitic on the roots of mallow to absorb its juice. When the climate is dry and the weather is hot, it is the most harmful to mallow. The best way to destroy Liedang is to shovel it into the ground in time when it is found.

Pest control of Glycyrrhiza uralensis Fisch.

Common diseases

Rust: The rust of Glycyrrhiza uralensis Fisch is manifested on the back of leaves, and it will have spots, which are yellowish brown. If the diseased spot is broken, brown powder will be scattered, and the powder also contains germs, which can form rust from August to September every year.

Prevention and treatment: If it is found in the early stage of the disease, it can be sprayed with Baume sulfur agent or enemy rust steel liquid. In severe cases, the sick licorice and other surrounding plants should be burned together.

Brown spot disease: The symptoms of Glycyrrhiza uralensis Fisch are manifested on the leaves, and various shapes of diseased spots will appear on the leaves. The middle of the lesion is grayish brown and the periphery is brown.

Prevention and treatment: If the disease is found early, it can be sprayed with Bordeaux mixture or methyl Tobruk powder. In severe cases, infected licorice should be burned together with other surrounding plants.

Powdery mildew: Powdery mildew will produce a lot of white powder on both sides of hay leaves.

Prevention method: Pomegranate sulfur can be sprayed.

Common pests

Aphids: Aphids live by sucking the juice of plants, which can cause plants to turn yellow in severe cases.

Control method: chlorpyrifos, dimethoate EC or dichlorvos EC can be sprayed once every 7 days to 10, and can be sprayed continuously according to the situation.

Starscream: Starscream usually occurs in August and will get worse in September. They mainly eat leaves and flowers of plants.

Prevention and control methods: You can use leftover vegetable paste soup or rice soup mixed with Baume's sulfur mixture for spray killing.

Pest control of fennel

Fennel, also known as fennel, coriander and so on. It is planted in all parts of the country; The height of the plant is between 0.4m, the flowering period is from May to June, and the fruiting period is from July to September. These flowers are small and yellow. Friends who have cooked should know that fennel is both a seasoning and a vegetable, and its fruit is still a traditional Chinese medicine. Let's talk about pest control in daily farming.

disease

powdery mildew

At the beginning of the disease, white spots will appear on the leaves of plants, and then they will gradually expand. In severe cases, the whole leaf will be necrotic.

gray mold

The disease mainly harms the leaves and petioles of plants, and will cause the leaves and petioles of plants to rot when it occurs.

root rot

As the name implies, the main damaged part is the root, which will directly lead to the death of seedlings at seedling stage, but will lead to root rot at mature stage, and the plants can be pulled out of the pot soil with a little drag. In severe cases, it will cause the whole plant to die.

Sclerotinia sclerotiorum

This disease mainly harms the petioles and stems of plants. Soften first after illness, and then slowly decay.

viral disease

It can harm the whole plant, in which the leaves will wrinkle after illness, and it will also hinder the normal growth of the whole plant and affect flowering and fruiting.

insect pest

aphid

This pest will start from the leaves of plants and reproduce very quickly. If it is not stopped in the early stage, it will spread all over the factory in a very short time. In severe cases, it will cause viral diseases of plants, which will lead to the death of the whole plant.

Prevention and cure method

When pests and diseases are found, they can be removed manually at the initial stage, and then sprayed with fungicides. In the middle stage, special drugs should be sprayed, and in the later stage, the parts with serious pests and diseases should be cut off first, then the pots should be replaced with soil for replanting, and then the drugs should be sprayed for prevention and control.

First of all, we should improve the feeding environment, pay attention to high temperature and cooling, and increase air circulation.

When watering daily, you must not make the soil accumulate water or keep the soil wet for a long time.

Pest control of Rosa spinosa

This is a shrub of Rosaceae, mostly distributed in the north temperate zone. In China, it is cultivated in many provinces, such as Heilongjiang, Inner Mongolia, Shaanxi and Gansu. In addition, it is also distributed in northern Europe and Japan. We can find it on sunny hillsides, forests or bushes. Our article mainly talks about how to deal with pests and diseases.

disease

The first disease is called black spot disease, which we are familiar with. Many kinds of plants will be troubled by this disease. It mainly harms the leaves of this plant. At the beginning of the disease, some small brown spots will appear on the surface of its leaves. With the aggravation of the disease, these small spots will gradually connect into some large circular spots, and the color will gradually deepen. To prevent and control this disease, it is necessary to clean up the fallen leaves in time and cut off the diseased parts. Secondly, you can spray some medicine, such as Bordeaux potion. Of course, it is also important to strengthen management, such as drip irrigation.

The second disease is called rust, which is also very common. It may have a great impact on leaves and branches, and even cause most leaves to fall off or even die in severe cases. For this disease, it is necessary to strengthen supervision, take measures as soon as possible, and spray the corresponding medicine once every other week for three or four times in a row, which can be well suppressed.

insect pest

First of all, the scarab is harmful to the leaves, flowers, roots and other parts of this plant, especially affecting the quality of flowering. To deal with it, you can use light to trap and kill the living. If it is very serious, you must spray insecticide.

The second kind is the thorn moth, which eats leaves and causes leaf damage. For this pest, first of all, we should carefully check whether there are eggs on the branches, if there are, cut them off in time and spray with liquid medicine such as Fuling emulsifiable concentrate.