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What are the control methods for pea bud blight?
The green beans and sprout vegetables from peas are very popular with consumers. However, during production, quality and yield are often affected by some physiological disorders and pathogen invasion. For example, bud blight, also called wet rot or head rot, has two very obvious symptoms. One is at the top of the tender stem, 2~
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What are the control methods for Spirogyra in rice fields?
The flocculent masses of Spirogyra in rice fields press and entangle the seedlings, causing delayed development, dead seedlings, or single plants with no tillering; they lower the water temperature, and when the Spirogyra coverage reaches 30%, they can reduce the water temperature by 2-3°C; when Spirogyra occurs in large amounts in rice fields, the applied fertilizer cannot reach the rice
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Prevention and Control Methods and Technical Key Points for Frost Damage in Apple Trees
Frost damage has always been a common factor causing damage to fruit trees, and this is especially true for apple trees. Moreover, since apple trees are perennial plants, once frost damage occurs, its effects are long-lasting. The series of rot diseases caused by frost damage also gives fruit growers quite a headache. Below
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Methods and Technical Key Points for Controlling Pests and Diseases of Gastrodia elata
There are two common diseases in Gastrodia elata cultivation: one is mold damage, and the other is rot disease. Rot disease and its control. Gastrodia elata rot disease is caused by multiple factors. When seed tubers are damaged by pests, mechanical injury, or exposed to adverse high-temperature and high-humidity conditions, they are susceptible to infection by miscellaneous fungi, causing rot.
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Seven Common Pests and Diseases and Their Control Methods
Brown Spot Disease Brown spot disease is a worldwide disease that, in severe cases, often causes large numbers of plant leaves to turn yellow and drop off. Symptoms The pathogen of brown spot disease is a fungus that mainly attacks the tips of leaves, appearing brown with a clear boundary from the healthy part. Later, the edges
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What to Do About Hollow Heart in Radishes? Causes and Control Measures in Early Spring
Radish hollow heart, also known as pithiness, is the phenomenon in which a cavity forms in the central part of the xylem of the fleshy root. 1. Causes: (1) Related to variety. Varieties with large parenchyma cells in the fleshy root have poor root density and are prone to hollow heart. (2) Related to soil texture. Radishes grown in soil with excessive sand tend to develop hollow heart earlier than those grown in loam or clay. (3) Improper water supply. If moisture is even during the early growth period but drought occurs later, especially during the fleshy root formation stage, soil water shortage hinders growth, resulting in hollow heart. (4) Unreasonable planting density. Under wider plant and row spacing, the fleshy root grows too quickly, and the growth of leaves and roots loses balance, so the organic nutrients produced above ground are insufficient to supply the needs of the expanding fleshy root below ground, making hollow heart likely. (5) Unreasonable fertilization. Especially when topdressing is too late and too heavy in the later stage, combined with improper matching of fertilizer types, applying too much nitrogen fertilizer makes the above-ground part of the radish grow too vigorously and the root becomes excessively large, causing hollow heart. (6) Harvesting too late or bolting having already occurred. (7) Wounds such as cracked skin and cracks caused during harvest, storage and transport increase respiration and cause excessive nutrient consumption, leading to hollow heart. (8) Storage temperature too high. The suitable storage temperature for radishes is 1-3 degrees; above 3 degrees they readily sprout and grow, leading to hollow heart. (9) Storage environment too dry. The ideal air humidity is 90-95%; when it is below 90%, radishes continuously lose water, making the tissues soft and causing hollow heart. 2. Control measures: (1) Choose varieties that are not prone to hollow heart and have a high degree of fleshy root density. (2) Plant at a reasonable density. (3) Fertilize scientifically. For spring radish fertilization, adopt the principle of giving priority to base fertilizer and supplementing with topdressing, and pay attention to the rational combination of the three elements nitrogen, phosphorus and potassium. (4) Supply water evenly. Prevent the soil from being too dry or too wet, and maintain soil moisture at 70%-80%, especially in the later growth stage of radishes, when the soil must not be too dry. (5) Harvest at the right time. (6) Chemical control: generally half a month before harvest, spray once with a 50mg/kg gibberellin solution (do not spray too early, to avoid inhibiting fleshy root expansion), or spray once with a 10mg/kg naphthaleneacetic acid solution, which neither affects fleshy root growth nor prevents hollow heart, and delays maturity. If when spraying 10mg/kg naphthaleneacetic acid, 5% sucrose and 5mg/kg borax solution are added and the three are mixed and sprayed, the effect of preventing hollow heart is even better. (7) Minimize mechanical damage such as broken skin and breakage during harvest and transport. (8) Pay attention to the temperature and humidity of temporary storage.
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Identification and Control of Rice Leaf Blast Symptoms
What is rice leaf blast? How to control it? Rice leaf blast is a common disease, and farmers should identify it carefully. This disease occurs on the leaves of seedlings after the three-leaf stage or on adult plants, generally breaking out heavily from the tillering stage to the jointing stage. The lesions on the leaves often differ in shape, size and color due to differences in weather and varietal disease resistance,
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What to Do When Rapeseed Gets the Cabbage Webworm? Effective Control Methods to Teach You
Rapeseed, also called oil cabbage or bitter cabbage, Latin name: Brassica campestris L., a plant of the Brassicaceae family and Brassica genus, originally from China, with dark green stems and stalks like Chinese cabbage, a variety of Brassicaceae cabbage, with yellow flowers. In agronomy, the multiple species of plants whose seeds contain oil
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Sugarcane borers cause great damage; how can they be controlled scientifically?
Sugarcane (scientific name: Saccharum officinarum) belongs to the genus Saccharum and is a perennial tall solid herb. Its rhizomes are thick and well developed. The stalks are 3-5 (-6) m tall. It is widely cultivated in tropical southern regions such as Taiwan, China, Fujian, Guangdong, Hainan, Guangxi, Sichuan and Yunnan. Sugarcane
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What to Do When Chinese Cabbage Splits Its Heads? Causes and Control Methods Explained
Chinese cabbage, a biennial herb, 40-60 cm tall, usually the whole plant is hairless, sometimes with a few bristles on the midvein on the underside of the leaves. Native to northern China, it is a leafy vegetable of the genus Brassica in the family Brassicaceae, usually referring to Chinese cabbage (napa cabbage); it also includes bok choy and the heading cabbage derived from cultivated varieties of cabbage, namely "round cabbage" or "foreign cabbage". Introduced to the south, it is cultivated throughout the north and south. It was introduced to Japan, Europe and the United States in the 19th century. There are many kinds of Chinese cabbage; northern Chinese cabbage includes Shandong Jiaozhou Chinese cabbage, Beijing Qingbai, Tianjin Qingmaye Chinese cabbage, Northeast Daaicai, Yutian Chinese cabbage, Shanxi Yangcheng Damaobian, and others. Chinese cabbage is eaten for its tender head, rosette leaves or flower stalks. It is widely used, and its cultivation area and consumption rank first among all vegetables in China.
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