-
Symptoms and control methods of lily blight
Symptoms: This disease mostly occurs on the young leaves of plants, and stems and flowers can also be affected. In the early stage of the disease, oily spots appear on infected leaves, which gradually expand and turn grayish green. In severe cases, the leaves and flowers become soft-rotted. On infected stems near the ground, the diseased part is water-soaked, turns brown, and shrinks, and the plant wilts, lodges, and dies. If the bulb is infected when it sprouts, only the top of the young stem withers. When humid, white mold grows on the diseased part. Pathogen: The pathogens are Phytophthora cactorum (Leb. et
-
Symptoms and Control Methods of Lily Leaf Blight
Lilies are native to the eastern and central regions of China. They are relatively cold-tolerant, prefer strong light, and do not tolerate shade. Insufficient light will affect growth and flowering. They do best in well-drained, organic-rich sandy loam. They have poor disease resistance and are susceptible to disease in hot, humid environments. Lily plants are upright and elegant, with large, brightly colored flowers and many varieties. They are suitable for planting in patches or clumps at the edges of lawns or in flower borders, creating a serene and harmonious effect. Lilies are also prized as potted flowers and cut flowers. Lily leaf blight, also known as lily gray mold, affects the plant's photosynthesis, hinders growth, and reduces ornamental value. When the disease occurs severely
-
Symptoms and Control Methods of Lily Anthracnose
Lily anthracnose harms the leaves, stems and flowers of the plant, causing premature leaf drop, seriously affecting the plant's growth and development and reducing its ornamental value. Symptoms: In the early stage of the disease, oval-shaped lesions appear on infected leaves, with the center of the lesion pale yellow and the edges purplish brown or dark brown, and the center of the lesion slightly sunken. Lesions on petals are light brown and become thinner. Infected flower stalks turn black. Infected bulbs generally occur on the outer scales, and sometimes also on the inner scales. In the early stage of the disease, light brown, irregularly shaped spots appear on the scales, after which the lesions expand and sink, changing from brown to black
-
A Detailed Guide to Common Lily Diseases and Their Control Methods
1. Bulb and scale rot and stem diseases caused by Fusarium. Symptoms: In plants with bulb and scale rot, growth is very slow and the leaves are pale green. Underground, brown spots appear at the top of the scales, on the sides, or where the scales join the basal plate, and these spots gradually begin to rot. If the basal plate stem is infected, the entire bulb will rot. The stem and leaf diseases caused by Fusarium are diseases that infect the above-ground parts. The identifying sign is that the basal leaves turn yellow before reaching maturity, and the yellowed leaves turn brown and drop off. On the stem
-
How to prevent and control common lily diseases? Detailed prevention and control methods
1. Soft rot. It harms the bulbs, causing them to rot and giving off a foul, offensive odor. It occurs severely when the temperature is high and humidity is great, causing rampant damage and spreading rapidly. Before planting, select undamaged bulbs and soak them in a 0.1% potassium permanganate aqueous solution for 8-10 minutes to disinfect them. After the disease occurs in the field, use a 5000-fold agricultural streptomycin aqueous solution, or a 5000-fold streptomycin sulfate aqueous solution, or a 5000-fold new phytomycin aqueous solution to drench the roots and spray the leaves, once every 7-10 days, for 2-3 consecutive times, pouring 2-3 kg
-
Occurrence and Control Methods of Common Diseases in Oyster Mushrooms
In recent years, with the expansion of oyster mushroom cultivation areas and the increase in cultivation years, pest damage has become increasingly common, showing a trend of early and rapid occurrence, and in severe cases, entire flushes of mushrooms are lost. Because oyster mushrooms are relatively sensitive to pesticides and prone to phytotoxicity, applying chemicals after pest outbreaks makes it difficult to achieve the effect of eliminating pests while protecting the mushrooms. Therefore, identifying the damage characteristics of various pests and reducing infection sources are effective measures to avoid and reduce pest occurrence. I. Pest Species 1. Sciarid flies, also called dark-winged fungus gnats, commonly known as small black mosquitoes, small flies, or white maggots (referring to larvae). They belong to the order Diptera, mosquito-like insects.
-
What to Do When Oyster Mushrooms Grow Green Mold? Causes and Control Methods
Recently, Li Zhibao, an oyster mushroom grower from Zhumiao Village, Nancheng Town, Xiajin County, Shandong Province, called for advice: This year the oyster mushroom market is good, with a wholesale price of 1.5 yuan/jin, so he invested 20,000 jin of substrate at once to cultivate oyster mushrooms, but now some green things have grown on the oyster mushroom cultivation bags. Experienced people say it is green mold, and he does not know what to do. The author's reply is as follows: Green mold is a major disease in edible mushroom cultivation, mainly occurring on mushroom blocks that have not yet been colonized or on culture substrate that has not been thoroughly sterilized. Green mold is prone to breeding in acidic and relatively humid environments. Its spores spread through the air
-
Causes of Gastrodia elata trait degeneration and control methods
Degeneration of Gastrodia elata traits usually manifests as a decline in the yield of arrow gastrodia, with the individuals becoming smaller and slender; the yields of rice gastrodia and white gastrodia drop substantially, the tubers turn ginger-yellow or light brown, stress resistance is poor, and the original yield and traits cannot be fully expressed. The causes are generally as follows: 1. Multiple generations of asexual propagation. Degeneration generally begins to appear after 5 to 6 generations of asexual propagation, but the speed of degeneration differs when cultivated on different soils; degeneration is slower when cultivated on granite soil, followed by yellow-brown earth sandy soil parent material, and the acidic soil formed by the weathering of shale or limestone.
-
What causes stunted cotton seedlings? A detailed explanation of prevention and control methods
During the transplanting period, cotton is often affected by abnormal weather, weak seedlings, inadequate cultivation measures and other factors, which cause a long slow-seedling period and stunted growth after transplanting, delaying the cotton's growth process and reducing cotton yield. The causes of stunted cotton seedlings and their prevention and control are described below: 1. Causes. 1. Poor cotton seedling quality. ① Insufficient fertilization of the seedbed produces small, weak seedlings with poor growth vigor that establish slowly. ② Improper seedbed management produces leggy seedlings or overgrown seedlings, which lose too much water after transplanting and suffer severe transplanting injury. 2. Unsuitable temperature. In many places
-
How to prevent and control cotton seedling stunting? These methods are worth trying
After cotton is transplanted, it is right in the plum rain season, with low temperatures, many rainy days, and little sunlight, which causes the cotton seedlings to turn green slowly, delays flower bud differentiation, and forms the "stunted seedling" phenomenon. The main types of stunted seedlings are: first, waterlogging-induced stunted seedlings. Commonly seen in low-lying cotton field sections, prolonged overcast and rainy weather causes waterlogging-induced stunted seedlings, leading to blackened roots, grayish-green leaves, and slow growth. Second, drought-induced stunted seedlings. Mainly due to drought, the leaves turn yellow and dry red, there are few new roots, growth is extremely slow, and the proportion of red stems is large. Third, fertilizer-induced stunted seedlings. The main reason is that the base fertilizer is applied too shallowly
条件筛选