Pest control in Huang Qiuying

The most common disease of this plant is leaf spot, which is more common. This disease mostly occurs in summer, and the temperature is getting higher and higher, and this disease will be more serious. At first, there were purple-brown spots on the leaves, and then they gradually expanded into circular spots. There will be holes in the leaves at last.

The second is root rot, which is mainly caused by the fact that the water in the sulfur Huang Ju basin soil doesn't like to dry in winter and the light oil can't keep up. The disease spreads from the roots, and if it is not treated in time, the whole plant will rot and die.

disease control

If it is the first time, you can treat it with a certain dose of carbendazim. If you want to get better results, you can also choose to use streptomycin sulfate and chlorothalonil alternately. For the second disease, prevention is very important. Try to reduce water consumption in winter. If planted outdoors, once the disease occurs during the growing period, drainage must be done well to prevent continuous rainy days, and a certain dose of Genfuling can be used for treatment once a week for four weeks.

primary pest

Aphids may be familiar to everyone, and almost all the flowers outside are willing to have this pest. This insect will suck juice from stems and leaves, which can not only directly destroy Huang Qiuying, but also indirectly lead to other diseases. We must find it as soon as possible.

control of insect

If this disease occurs, it is recommended to treat it with a certain dose of wanling or derris extract. These two drugs can also control scale insects. Use it once a week, and it will be fine for 3 weeks at most.

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 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.

Pest Control of Rhododendron

Rhododendron wax leaves are common family ornamental flowers. Colorful flowers are very beautiful, but they are also very vulnerable to various pests and diseases. So what are the common diseases and insect pests of azalea wax leaves and how to prevent them? Let's get to know each other.

Leaf swelling disease

Leaf swelling is a disease caused by fungi, which often occurs in the seasons of spring and summer and autumn and winter, especially in late spring. The disease mainly occurs on young leaves and buds. After the onset, the leaves will swell and expand, and the front end of the affected area will be spherical. At first, there will be reddish spots, then the spots will gradually turn brown, and white powder will appear on the leaves. Then all the spots will turn dark brown, and the whole leaves will swell and curl, and finally the diseased leaves will die and fall off.

Prevention and treatment: Cut off the diseased leaves as soon as possible before the diseased spots expand and produce white powder. Be careful not to leave the diseased leaves in the pot soil and burn them all from the plants. After the diseased leaves are removed, the plants are sprayed with zineb liquid medicine for sterilization.

leaf spot

Leaf spot is a common disease of azalea wax leaves, which usually occurs in wet rainy season. At first, there will be some small brown spots, then the spots will gradually increase and darken, forming dark brown spots, black spots on the patches, and finally the leaves will turn yellow and wither. Leaf spot disease has a great influence on the growth of wax leaves of rhododendron, which will not only affect the flowering situation this year, but also affect the formation of flower buds in the next year.

Prevention and treatment methods: After leaf swelling is found, the diseased leaves should be cut off as soon as possible, and then Tobuzin liquid medicine should be sprayed on the plants for treatment.

Leaf wax disease

This disease is usually caused by an infection caused by aphids. At the onset, a layer of white or pale pink waxy substance will be produced at the tip of the blade, which will make the leaves wither and fall off.

Control method: clean all infected leaves first, and then spray the plants with copper-containing preparation for treatment. In daily maintenance, insecticides can be sprayed to control aphids and other similar pests.

Jaundice

Rhododendron wax leaves like weak acid soil environment, if the soil is alkaline, it will lead to yellowing and necrosis of leaves; If any factor goes wrong, such as improper maintenance, too much or too little water, untimely fertilization, insufficient light supplement, etc. It will cause the wax leaves of rhododendron to turn yellow. To prevent verticillium wilt, we should pay attention to reasonable cultivation according to the needs in daily life.

Junpeichong

This pest often gathers on the back of leaves to suck juice for a living, which will lead to some white and yellow spots on the diseased leaves and affect the growth of plants. In order to prevent and control this disease, we can spray phoxim and other liquid drugs to control pests.

Trichophyton brevis

This kind of insect usually breeds in summer and feeds on the juice of plants. After the onset, large leaves will fall off, which will greatly affect the growth of plants. Similarly, there are sawflies and scale insects. Insecticides can be carried out by drugs or manually. Usually, we should pay attention to the ventilation of the environment, spray drugs in time for sterilization, and maintain and prevent it reasonably.