Flower pest and disease identification methods to help you quickly diagnose
Flower diseases are generally divided into two categories: physiological diseases and parasitic diseases. Physiological diseases are mainly caused by unsuitable conditions such as climate and soil. Common physiological diseases include: sunburn caused by strong light in summer; freezing damage caused by low temperatures in winter; root rot caused by excessive water; leaf edge scorching and wilting caused by insufficient water; deficiency symptoms from a lack of certain nutrient elements in the soil, and so on. Now let us introduce them.
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 capabilities, and strong reproductive capacity. They can spread from infected plants to healthy plants through various channels (stomata, wounds, insects, wind, rain, etc.), growing, developing, reproducing and spreading under suitable environmental conditions, cycling endlessly and gradually expanding and spreading. Therefore, this type of disease causes the greatest harm to flowers. Fungi: Fungi are lower organisms with true nuclei and no chlorophyll. 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 water-soaked affected tissue or backlit lesions, and under humid conditions, bacterial slime oozes out from the diseased parts, producing an "ooze" phenomenon, which 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. Their form can only be observed with an electron microscope. They parasitize within the living cell tissues of flowers and can travel with the host's sap flow throughout the flower's body, spreading to 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 class of lower animals. Nematodes have slender bodies with slightly pointed ends, generally 1-2 mm in length, resembling a roundworm. The female adults of a few nematodes are spherical or pear-shaped. They mostly survive in the soil, parasitizing flower roots, stimulating local cell proliferation of the host and forming tumor-like growths. Common nematode diseases include cyclamen root-knot nematode disease, etc.