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Occurrence Patterns and Control Methods of Black-Streaked Dwarf Disease in Spring Corn
Black-streaked dwarf disease is a viral disease transmitted by the virus-carrying small brown planthopper (Laodelphax striatellus), with the seedling stage being the main susceptible period. Since the 1990s, with changes in planting structure, black-streaked dwarf disease in single-season rice and spring corn in Chun'an County has worsened year by year, especially since 2000, when rice black-streaked dwarf disease has occurred throughout the county,...
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Spring Corn Aphid Control Methods and Key Points for Pesticide Application
The spring corn aphid belongs to the order Homoptera, family Aphididae, and mainly damages crops such as corn, sorghum, wheat, and foxtail millet, with adults and nymphs piercing and sucking plant sap. During the seedling stage, aphids gather on the undersides of leaves and in the heart leaves, causing damage. In mild cases, corn growth is poor; in severe cases, plant growth stagnates, and even seedlings die. In addition, it can transmit corn dwarf mosaic virus disease...
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What are the control methods for white rust in water spinach?
How do you control white rust in water spinach? Please advise. First, carry out a 2- to 3-year crop rotation with other vegetable varieties. Second, before sowing, treat the seed at a ratio of 300 g of 35% metalaxyl per 100 kg of seed for sterilization; third, in the early stage of the disease, use 50% copper metalaxyl wettable powder at 6000 to 7000 times dilution, or 72.2% propamocarb aqueous solution...
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What are the control methods for white rust in water spinach?
How do you control white rust in water spinach? Please advise. 1. Implement a 2- to 3-year crop rotation with other vegetable varieties. 2. Before sowing, dress the seed for sterilization at a ratio of 300 g of 35% metalaxyl per 100 kg of seed; 3. In the early stage of the disease, spray with 50% copper metalaxyl wettable powder at 6000 to 7000 times dilution, or with 72.2% propamocarb aqueous solution at 8...
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What are the control methods for white rust in water spinach?
How should water spinach be cultivated? Please advise. 1. Variety selection. Suitable varieties for planting include Daji Huang, Dagu Qing, Jian Ye, Si Yong, Daji Qing, and others. 2. Cultivation season. Greenhouse cultivation can basically achieve year-round production and year-round supply. 3. Land preparation and fertilization. Water spinach grows quickly...
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What are the control methods for blueberry bud mites?
How much water does blueberry growth require? Please advise: adequate soil moisture is essential for blueberry growth, and insufficient water will severely affect tree growth and yield. From budbreak to leaf fall, the water required by blueberries is equivalent to an average weekly precipitation of 25mm, and from fruit set to harvest, 40mm. Sandy soil...
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What are the control methods for papaya crown rot?
How do you control papaya crown rot? Please advise. When papayas show varying degrees of crown rot, and even lodging and plant death, it is likely stem base rot, which is more likely to occur under high temperature, frequent rain and humidity. Control: generally use agents targeting root rot and Phytophthora blight of cucurbits and vegetables, or bactericidal agents. If diseased plants are found, remove the...
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How to prevent and control strawberry powdery mildew? Master these methods
How to prevent and control strawberry powdery mildew? Please advise. Strawberry powdery mildew can be prevented and controlled by referring to the following techniques: 1. Disease symptoms. It mainly damages leaves, flowers, fruit stems and fruits, and rarely occurs on runners. In the early stage of leaf infection, a thin frost-like white powdery substance appears locally on the underside of the leaves, and then rapidly spreads to the whole plant. As the disease worsens...
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How to prevent and control forked radish roots? Practical methods to share
How should forked radish roots be prevented and controlled? Please advise. The forked radish root phenomenon is when the fleshy root is short and small and branches out. The causes of forked radish roots include the following aspects: 1. Poor soil properties: if the soil is too hard or there are stones in the soil, the fleshy root cannot grow downward and becomes bent and branched, forming forked roots. 2. Organic fertilizer...
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What are the control methods for maggots in radishes and cabbage?
How can cultivation improve the quality of radishes? Please advise: the following methods can be used to improve radish quality: 1. Choose high-quality varieties and new seeds. Choose radish varieties with dense fleshy roots and high dry matter content. In production, use new seeds with strong vitality, not old seeds. This is very important for improving radish quality...
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