What to do if the flower is sick

Why do flowers become diseased?

The causes of flower diseases can generally be divided into two categories: one is caused by the inability to adapt to external environmental conditions, which is often due to poor planting environment, such as excessive or insufficient water, too strong or too weak light, too high or too low temperature, etc. This type of disease is also called physiological disease. The other type is caused by microbial infection, which is caused by fungi, bacteria, viruses, etc. invading plants, among which fungal infections are the most common.

Why are the flower branches thin and the internodes long?

This is caused by insufficient light, and the sunshine time should be increased. If the rainy time is too long, you can artificially increase the lighting time, that is, use fluorescent lamps.

Why are the lower leaves of the plant curling, the branches and leaves growing slowly, and the leaves having burnt edges?

It's caused by too much light. Care should be taken to do this appropriately. Potted plants at home can be moved under a shade shed for maintenance for a period of time.

The leaves are shrinking and the lower leaves of the plant are falling off. What is going on?

It is due to lack of water. Each time you water, be sure to water sufficiently. Do not water halfway. Follow the principle of "don't water unless the soil is dry, and water thoroughly when you do." This phenomenon is mostly caused by half-watering.

Why are the branches and leaves wilting, the leaf color turning darker and gradually rotting?

It's caused by overwatering. The frequency and amount of watering should be controlled. Check the drainage holes in the basin in time to see if they are blocked to ensure smooth drainage.

What is powdery mildew?

Powdery mildew is a disease caused by pathogens that attach to the buds, young leaves, young shoots and pedicels of flowers. In the early stage of the disease, chlorotic spots often appear on the affected parts, which gradually turn into white powdery spots and then gradually turn into gray in the later stage. The affected leaves and tips curl, shrink and become deformed, the flower buds cannot open normally, and the spores of the pathogen can be spread through air currents. The disease is most likely to occur on a large scale when the temperature difference between day and night is 10 °C. Impatiens, roses, cineraria, plum blossoms, fuchsias, and dahlias often suffer from this disease.

What is anthrax?

This disease mainly harms leaves, but can also harm young stems, flower buds and other parts. A type of circular spot that appears on very dirty parts of the leaves, such as light brown or gray, with purple-brown or dark brown edges. It often appears on the leaf edges or tips and has small black dots. That is, the spore disk of the pathogen, which can cause the leaves to wither and die in severe cases. Another symptom is the formation of circular or nearly circular spots on the stems, which are light brown or grayish white with many small black spots on them. During the rainy season, cactus plants are most susceptible to infection. It also often harms flowers such as plum blossoms, camellia, Clivia, hydrangea, rubber trees, orchids, cyclamen, and dieffenbachia.

What is black rust?

The cause of black rust is that the pathogen infects plants in the form of spores. When the disease first occurs, small pale spots appear on the front of the leaves, gradually expanding into round protrusions, and the epidermis on the back cracks to produce orange-yellow powder. In severe cases, the whole plant is infected from bottom to top, and the leaves become scorched and fall off. Commonly affected flowers include roses, irises, and roses.

What is seedling blight?

This disease is a seedling disease caused by Rhizoctonia solani and Fusarium solani. Symptoms include rot, damping-off, and damping-off. Seedlings are most vulnerable about 20 days after emerging from the soil. Common susceptible flower seedlings include crabapple, lily, gladiolus, carnation, etc.

What is sooty disease?

Sooty mold is caused by a variety of fungi, mostly transmitted by scale insects and aphids. In the early stage of the disease, dark brown spots appear on the leaf surface, which gradually expand to form a black, sooty mold layer, which prevents the plant from photosynthesizing and producing nutrients, causing it to wither and die.

What is root cancer?

The pathogen of this disease mostly infects the root part first, causing irregular tumors to appear on the roots. At the beginning, they are light brown, with a rough, soft or spongy surface. In the later stage, the color gradually darkens, and the internal tissue becomes a hard tumor. In severe cases, the entire plant will die. This disease mainly harms chrysanthemums, roses, plum blossoms, dianthus, begonias, cherry blossoms, dahlias, and geraniums.

What is bacterial perforation?

In the early stage of the disease, light brown water-soaked spots with a light yellow halo around them will appear on the leaves. Then the spots will gradually expand and turn dark brown or purple-brown. The area around the spots and components will become lignified and cause perforation. This disease often occurs on the leaves and branches of plum blossoms, cherry blossoms, peach trees, etc., and sometimes occurs on fruits.

How to prevent and control fungal diseases?

During the growth period of flowers, spray Zineb once every week. Spraying 3 to 5 times in a row can effectively prevent the disease. Pay attention to flower cultivation to make the plants grow strong and improve the disease resistance of flowers. The emperor removed dead leaves and fallen leaves, cut off diseased branches and buds in time, and destroyed them in batches. At the early stage of the disease, spray 500-800 times diluted 50% carbendazim or thiophanate-methyl or 75% thiophanate-methyl solution.