Experts teach you how to identify flower diseases and insect pests

Flower diseases are generally divided into physiological diseases and parasitic diseases.

physiological disease

It is mainly caused by unsuitable conditions such as climate and soil. Common physiological diseases include: burns caused by strong light in summer; freezing damage caused by low temperature in winter; excessive water leading to rotten roots; insufficient water causing scorched edges and wilting of leaves; lack of certain nutrient elements in the soil, deficiency of elements, etc.

parasitic disease

Is due to fungi, bacteria, viruses, nematodes and other infections caused by flowers. These organisms are different in morphology, but most of them have parasitism and pathogenicity, and have strong breeding ability. They can spread from susceptible plants to healthy plants through various ways (stomata, wounds, insects, wind, rain, etc.), grow, develop, breed, spread under suitable environmental conditions, and gradually expand and spread. Therefore, this kind of disease causes the greatest harm to flowers.

fungi

Fungi are lower eukaryotes without chlorophyll. It takes mycelium as vegetative body and spores as culture, which is the most important kind of flower disease. Fungal diseases mostly have obvious symptoms, such as mold, powder, rust, dots, filaments, etc. These characteristics are one of the main basis for identifying fungal diseases. Common fungal diseases are powdery mildew, anthracnose and so on.

bacteria

Bacteria are single-celled prokaryotes that are cultured by division. Bacterial diseases are characterized by water-stained or translucent lesions in the affected tissues, and bacterial mucus overflowing from the affected parts under wet conditions, which is one of the main basis for identifying bacterial diseases. Common bacterial diseases are bacterial soft rot of iris and so on.

virus

It's a microscopic parasite. You have to use an electron microscope to see it. It parasitizes in the living cell tissue of flowers and spreads to the whole plant along with the flow of host juice, causing diseases of the whole plant. Virus disease often presents mosaic, yellowing, deformity, ring spots and other symptoms. Common viral diseases include narcissus virus disease.

nematode

Nematodes belong to a class of lower animals. Nematode slender body, slightly pointed at both ends, body length is generally 1-2 mm, like a roundworm. A few female adults of nematodes were spherical or pear-shaped. More than survive in the soil, parasitic in the roots of flowers, stimulate the host local cell proliferation, the formation of tumors. Common nematode diseases are cyclamen root knot nematode disease.