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What are the main cotton pests and diseases in summer and autumn?
What are the main cotton pests and diseases in summer and autumn? Please introduce the following: the main cotton pests and diseases in summer and autumn and their control methods: I. Pest and disease occurrence trends (1) Cotton mirids: moderate occurrence is expected during the flowering and boll-setting stage, and moderate to severe occurrence in cotton fields with vigorous late growth; the peak occurrence period is from late August to early September, with an affected area of 700,000 mu.
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What are the control methods for cherry blossom crown gall disease?
How do you control cherry blossom crown gall disease? Here are the methods. The gorgeous cherry blossom is deeply loved by people, but it is easily infected by a fatal crown gall disease. This disease mainly occurs on the roots and on the trunk and lateral branches of the aboveground part of the cherry blossom. In the early stage of the disease, the root crown swells into spherical or hemispherical tumor-like growths; young galls are white, with a soft texture...
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What are the common pests and diseases of cherry blossoms, and how are they controlled?
What are the common pests and diseases of cherry blossoms? Here is an introduction to how to control them. There are many types of pests and diseases affecting cherry blossoms; the common ones are described below: Shot-hole brown spot disease occurs from May to June, with small purplish-brown spots appearing on the leaves, which gradually expand into circular shapes; after the diseased spots dry and shrink, they become small holes. The pathogen mostly overwinters on diseased branches and diseased...
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What are the common types of pests and diseases affecting cherry blossom trees?
What pests and diseases affect cherry blossoms? How should they be prevented and controlled? There are many types of pests and diseases affecting cherry blossoms. The common ones are described below: 1. Shot-hole brown spot disease occurs in May and June, with small purplish-brown spots appearing on the leaves, which then gradually expand into circular shapes; after the diseased spots dry and shrink, they become small holes. The pathogen mostly overwinters on diseased branches...
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What Is Papaya Brown Rot? A Guide to Diseases in Papaya Cultivation
What is papaya brown rot? What methods can be used to control it? Here is an introduction to the damage caused by papaya brown rot: brown rot mainly affects the fruit, but it can also affect flowers and young shoots. When the fruit is infected, small brownish nearly round spots appear first, and as the disease progresses the spots keep expanding; under suitable conditions, the spots quickly spread across the entire...
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What is papaya powdery mildew? Papaya tree cultivation disease knowledge
What is papaya powdery mildew? What harm does papaya powdery mildew cause and how to prevent and control it? Please give an introduction. Harm of papaya powdery mildew: Papaya powdery mildew mainly harms young leaves and leaf stalks. The affected parts first show many granular protrusions, and soon white powder appears on them. Infection by this disease is seasonal, occurring commonly in winter and early spring....
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What is papaya seedling root rot disease in papaya tree cultivation?
What is papaya seedling root rot disease? What harm does papaya seedling root rot disease cause? How is papaya seedling root rot disease prevented and controlled? Please provide guidance: papaya root rot disease is also called papaya root rot; the main harm of papaya seedling root rot disease: root rot mainly damages the root collar and roots, and seedlings during the nursery period and those planted not long ago are more susceptible to the disease....
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What is papaya blight? A detailed guide to diseases in papaya tree cultivation
What is papaya blight? How can papaya blight be prevented and controlled effectively? Please provide guidance on methods. The harm caused by papaya blight: papaya blight is commonly known as "water wound"; the pathogen is Phytophthora parasitica, which mainly damages papaya fruit and also damages the root system; it is prone to occur under high temperature and high humidity, especially after rain, and the pathogen can spread through airflow, rainwater, irrigation water, etc...
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Papaya Tree Cultivation: What Is Papaya Mosaic Virus Disease?
What is papaya mosaic virus disease? What are the control methods for papaya mosaic virus disease? Please provide guidance. Papaya mosaic virus disease damage: Papaya mosaic virus disease is a devastating disease that has commonly occurred in papaya production areas in recent years. Once the plant is planted, it will develop the disease, with mottled yellow flower spots appearing on the leaves, and new leaves densely...
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Navel Orange Cultivation Techniques: How to Prevent and Control Physiological Diseases of Navel Oranges?
How to prevent and control physiological diseases of navel oranges? Please provide an introduction. The main physiological diseases of navel oranges are fruit cracking, sunburn, and navel yellowing. For control methods, please refer to the following list: Control methods for navel orange fruit cracking. For navel orange fruit cracking, first select varieties (lines) with strong cracking resistance. Generally, varieties (lines) with oval fruit shape, small navel or closed navel have better cracking resistance, such as Newhall and others. Second, strengthen scientific management to enhance tree vigor. Especially during the drought period after the plum rain and before the autumn rains arrive, water management must be done particularly well, with timely irrigation or watering (sprinkling) to keep the soil moist and promote normal fruit growth and development. Third, during the rapid fruit expansion period, spray foliar potassium fertilizer 2 to 3 times consecutively.
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