What do parasitic flower diseases mean?

For flower diseases, they can generally be divided into physiological diseases and parasitic diseases. Physiological diseases are generally burns caused by strong light, frost damage caused by low temperatures, and so on, summarized as being caused by unsuitable conditions such as climate and soil. So what are parasitic flower diseases?

Narcissus (detailed introduction)

Parasitic diseases are caused by fungi, bacteria, viruses, nematodes and other organisms infecting flowers. These organisms vary in form, but most have parasitic and pathogenic ability, and strong reproductive capacity. They can spread from infected plants to healthy plants through various routes (stomata, wounds, insects, wind, rain, etc.), growing, developing, reproducing and spreading under suitable environmental conditions, repeating the cycle and gradually expanding and spreading. Therefore, this type of disease causes the greatest harm to flowers. Fungi Fungi are lower organisms that have no chlorophyll and have eukaryotic cells. They use mycelium as their vegetative body and reproduce by spores, and are the most important category among flower diseases. Most fungal diseases have obvious symptoms, such as mold-like substances, powdery substances, rust-like substances, dot-like substances, thread-like substances, etc. These features are one of the main bases for identifying fungal diseases.

Common fungal diseases include powdery mildew, anthracnose, etc. Bacteria Bacteria are a type of single-celled prokaryotic organism that reproduce by division. The characteristics of bacterial diseases are mainly that the affected tissue becomes water-soaked or the lesions are translucent, and under humid conditions bacterial slime overflows from the affected area, producing an "ooze" phenomenon. This is one of the main bases for identifying bacterial diseases. Common bacterial diseases include iris bacterial soft rot, etc. Viruses Viruses are extremely tiny parasites. An electron microscope is required to observe their form. They parasitize within the living cell tissues of flowers and can travel with the flow of host sap within the flower plant, spreading throughout the whole plant and causing whole-plant disease.

Viral diseases often show symptoms such as mosaic, yellowing, deformity and ring spots. Common viral diseases include narcissus viral disease, etc. Nematodes Nematodes belong to a type of lower animal. Nematodes have slender bodies, slightly pointed at both ends, generally 1-2 mm in body length, like a roundworm. The females of a few nematodes are spherical or pear-shaped. They mostly live in the soil and parasitize the roots of flowers, stimulating local cell proliferation of the host and forming tumor-like growths. Common nematode diseases include cyclamen root-knot nematode disease, etc.

Flowers and Health

 Roses given to friends, lilies to celebrate a new marriage; a bouquet of carnations, in deep gratitude for a mother's grace... Fresh flowers, as a daily consumer product, have entered the millions of households that have already begun to grow more prosperous.

Fresh flowers are a symbol of beauty and a sign of health and vitality. There are many fresh flowers in life that not only have ornamental value, but also have effects such as beautifying the face and nourishing the body, providing nutrition and tonics, prolonging life, and treating illness and strengthening the body. Flowers and people's lives are directly and indirectly linked in countless ways.

◆ Beautifying the environment

Selecting various flowers with certain ornamental value indoors and outdoors, and planting and arranging them according to certain aesthetic principles, makes the environment in which people live, work and study beautiful and comfortable, bringing people a pleasant mood.

◆ Regulating the climate

Flowers, grasses and trees can regulate the temperature and humidity of the air. In places with flowers, a small environment that is warm in winter and cool in summer can be formed. According to measurements, on summer days in places with trees, the temperature can be 3-5°C lower than in open areas, and the humidity can be increased by 10%-20%.

 ◆ Purifying the air

Many flowers have the function of absorbing and filtering various dust particles in the air. According to measurements, at the same site 1.5 meters above the ground, places with trees, grasses and flowers have 56.7% less dust than open areas. Flowers can also provide large amounts of oxygen. According to measurements, every square meter of leaf area per hour can absorb 1.5 grams of carbon dioxide (equivalent to 3 times the carbon dioxide exhaled by an adult per day) and release 3.8 grams of oxygen. The huge leaf area continuously carrying out photosynthesis can provide a steady supply of oxygen and fresh air. Indoors, rooms with flowers have 50% less mold and bacteria than rooms without flowers.

Flowers can absorb toxic gases harmful to human health such as sulfur dioxide and hydrogen fluoride, while the flowers themselves are not harmed. The flowers and trees conduct the absorbed harmful gases to the roots, and microorganisms parasitic on the roots decompose them. People have also found that some cacti and other succulent plants originating from tropical arid regions have a completely different mode of photosynthesis from ordinary plants. They open their stomata only at night to absorb carbon dioxide, and by day they close their stomata completely. The carbon dioxide produced during nighttime respiration can also be absorbed and digested by themselves without being released externally, thereby making the air fresh. According to measurements, one pot of bromeliad can absorb more than 100 grams of carbon dioxide each night. A person exhales about 300 grams of carbon dioxide over 8 hours at night. Calculating this way, in a 10-square-meter room, placing just two pots of bromeliads is completely enough to ensure fresh indoor air.

◆ Medical care and health

According to statistics, there are hundreds of flowers that can emit different fragrances. The fragrance of flowers can make people feel cheerful and relaxed and eliminate fatigue, and at the same time has a therapeutic effect on diseases. For example, lilac flowers can reduce the sensation of pain; pine and cypress trees can secrete certain bactericides, etc. In addition, many varieties among flowers are traditional precious Chinese medicinal materials. According to statistics, among more than 2,200 kinds of medicinal materials, flower medicinal materials account for 1/3. For example, ginkgo leaves are a top-grade medicinal material for treating cardiovascular diseases, eucommia bark can tonify the liver and kidneys, calm the fetus and lower blood pressure, and peony, forsythia, Chinese trumpet creeper, safflower, pomegranate, honeysuckle, etc. all play important roles in safeguarding people's health and treating diseases.

◆ Delicious food and beauty

Flowers are an important resource of the motherland's unique medicinal cuisine. Many flowers are nutritious vegetables, such as white orchid, osmanthus, cactus, rose, jasmine, etc. They can be made into delicious vegetables and pastries. Today the market sells many pollen health supplements, which have the effects of preventing aging, increasing appetite and reducing weight. According to measurements, pollen contains 96 kinds of substances, including 22 kinds of amino acids and 14 kinds of vitamins. It almost includes all the vitamins needed for human growth and development. For example, aloe candy, aloe drinks, aloe bread, aloe pastries, etc. are popular in foreign markets. Flower beauty and skincare products are all the rage around the world. For example, cactus facial cleanser, aloe facial cleanser, aloe lip balm, aloe toothpaste, etc. According to measurements, aloe contains large amounts of plant protein and vitamins A, B, C, E and brassinosteroids. These vitamins can reduce wrinkles on human skin and increase skin elasticity, with remarkable effects.

 ◆ Monitoring function

Some flowers react rapidly when encountering certain toxic substances, thereby serving as a forecasting and predictive function. They can be called guardians of the environment. For example, pine and fir needles turn yellow and dry after encountering sulfur dioxide. Clove, apricot and walnut are sensitive to automobile exhaust. Rhododendron, peony, tulip, cherry blossom, evergreen and gladiolus are sensitive to hydrogen nitride, and after encountering toxic gas, purple or dark brown spots appear at the leaf tips or leaf margins. Chinese trumpet creeper is sensitive to ozone. Cosmos is sensitive to chlorine gas, etc. They become alarms for whether toxic gases exist and at what concentration.

◆ Forecasting special disasters

Some flowers and trees undergo abnormal changes before earthquakes. For example, before the great Tangshan earthquake in 1976, some willow branches in Tianjin withered and died, bamboo bloomed, and fruit trees bore fruit and then bloomed again. Before the earthquake in the Liaoning sea area in February 1976, many apricot trees bloomed a second time. These phenomena can serve as references for earthquake forecasting.

◆ Refuge in special periods

In many earthquake zones, large trees at the junction where green spaces connect with their surroundings effectively prevented the collapse of adjacent buildings and also played a fireproofing role. Vertical greening effectively prevented flying debris from harming people. They are also places for temporary refuge during floods. In addition, flowers can effectively prevent soil erosion and protect farmland. They also have effects such as reducing noise pollution, preventing light pollution, lowering wind speed, increasing sunlight intensity, and reducing ultraviolet damage to the human body.

◆ Floral fragrance Fragrance can produce a feeling of comfort in people. The fragrance of lemon makes people positive and excited; the sweetness of osmanthus eliminates physical and mental fatigue; the delicate fragrance of narcissus and lotus can induce warm and romantic feelings; the fragrance of violet and rose makes people cheerful; the fragrance of apricot blossoms can evoke beautiful memories; the delicate fragrance of lilac and jasmine can make people feel relaxed, and the fragrance of lilac can also reduce the pain of people with toothache; geranium flowers have calming, sleep-inducing and asthma-relieving effects on the human body; jasmine fragrance also has the effect of dispelling drowsiness.

It can be seen that flowers have an effect that cannot be underestimated in preventing air pollution, purifying community air, and improving living and working environments. Flowers are elegant gifts for friendly exchanges and mutual gifting, and are a symbol of civilization and messengers of civilization.

Methods for preventing and controlling flower diseases

  Flower (Flower ['flauə]; plural: Flowers) is a general term for plants grown for appreciation, with modified short branches that have reproductive function, and there are many kinds.

A typical flower, on a short axis of limited growth, bears the calyx, petals, and the stamens and pistils that produce reproductive cells. A flower is composed of the corolla, calyx, receptacle and stamens and pistils, and comes in all kinds of colors; some grow very gorgeously and have fragrance.